Ah History, what would it be if it didn’t repeat itself.
However, the door was left open for Mexicans (who even then were desired  by employers for their cheap labor) and northern Europeans. As history  would show, this legal immigration led to illegal immigration and  foreshadowed today’s debate on these topics. During the 1920s illegal  immigration was the subject of heated Congressional debates. Edward H.  Dowell, vice-president of the California Federation of Labor, testified  before the U.S. Senate Committee on Immigration in February of 1928  about the burden of the unrestricted flow of Mexicans on the state’s  taxpayers, prisons, hospitals and American workers’ wages. He estimated  that while 67,000 Mexicans entered the U.S. legally the prior year, many  times that number entered illegally.
Furthermore, a Los Angeles Times story from April 1926 noted that many  of the ranch workers in California’s Imperial Valley entered the U.S.  illegally without passing the (then) literacy test and did not pay the  $18 entrance fee. In February of 1929, the U.S. House Immigration  Committee heard testimony from government officials about problems at  the border with both Canada and Mexico, including steps that were taken  to eliminate the “visa mill” at Juarez (opposite El Paso), where were  found “the most lax conditions imaginable in connection with inspection  of persons wishing to enter the United States.” Visas were required for  legal residency.
This repatriation began during President Herbert Hoover’s administration  and reached its peak in the early 1930s. It also applied to all alien  groups, not just Mexicans. Hoover believed they were taking jobs from  Americans, and endorsed a vigorous effort to reduce legal and illegal  entries and expel “undesirable aliens.” Deportations and repatriations  of Mexicans and others decreased (along with legal immigration) during  President Franklin Roosevelt’s administration, during the Great  Depression, but did not end. In July 1935, for example, Roosevelt  ordered a large deportation of alien criminals (such as mail robbers),  but exempted Mexican and Canadian criminals due to the fear that they  would sneak back in.
Over the next two decades about 4.8 million Mexican workers came into  the country and provided cheap labor to many U.S. employers. Although  braceros were supposed to be hired only if an adequate number of  Americans could not be found, employers preferred the foreign workers  who were willing to work for lesser wages. The program finally ended in  1964 due to complaints from unions and Mexican-Americans that these  foreigners were taking jobs from them. Not surprisingly, many of the  former braceros reentered and worked in the U.S. illegally – many for  the same employers.  Illegal immigration increased greatly during the years of the supposed  “temporary work” Bracero Program. The Los Angeles Times reported in May  1950 that 21,000 Mexican nationals had “flooded across Mexican border  into the United States during April” and complained about the  overworked, understaffed border patrolmen and the “the endless wave of  line jumpers, unprecedented in the nation’s history.” The argument about  jobs “Americans won’t do” was recited by an employer, while the  authorities stressed the need to enforce the law.
During President Dwight D. Eisenhower’s first term, it was estimated  that illegal Mexican border crossings had grown to about 1 million. Such  a massive illegal workforce had a devastating impact on the wages of  American workers. Eisenhower, concerned about corruption that resulted  from the profits of illegal labor, took decisive action. In 1954 he  appointed General Joseph Swing to head the Immigration and  Naturalization Service. Shortly thereafter, “Operation *******” was  launched. With only 1,075 Border Patrol agents, tens of thousands of  illegal aliens were caught and sent back deep into Mexico. Hundreds of  thousands more returned to their homeland voluntarily. Illegal  immigration had dropped 95% by the end of the 1950s.
But it was not to last, as seen in prior decades, after the 1965  Immigration Act passed, while legal immigration increased sharply,  illegal immigration rose right along with it. As the Center for  Immigration Studies noted, this increased immigration in part because  Congress “shifted the legal preference system to family relations and  away from employment needs and immigrant ability.” Senator Edward  Kennedy said at the time: “The bill will not flood our cities with  immigrants. It will not upset the ethnic mix of our society.” However,  this bill spurred “chain migration” which fueled illegal immigration,  along with a sense of entitlement amongst illegal immigrants. In  subsequent decades, Mexico has become the primary source country of both  legal and illegal immigration.
Many illegal aliens also use the lure of “birthright citizenship,”  (a/k/a “anchor babies”) to circumvent U.S. immigration laws and gain  permanent residency, if not citizenship. This is a misinterpretation of  the 14th Amendment to the Constitution that grants U.S. citizenship on  those born on American soil, including children of illegal aliens.  Illegal immigrants know that the odds are low that U.S. immigration  authorities will deport them, if they have a child who is an American  citizen (and who as a bonus also qualifies for taxpayer-funded  benefits).
Since the Immigration and Nationality Act of 1965, Congress has passed seven amnesties:
- Immigration and Reform Control Act (IRCA), 1986: A blanket amnesty for over 2.7 million illegal aliens
- Section 245(i) Amnesty, 1994: A temporary rolling amnesty for 578,000 illegal aliens
- Section 245(i) Extension Amnesty, 1997: An extension of the rolling amnesty created in 1994
- Nicaraguan Adjustment and Central American Relief Act  (NACARA) Amnesty, 1997: An amnesty for close to one million illegal  aliens from Central America
- Haitian Refugee Immigration Fairness Act Amnesty (HRIFA), 1998: An amnesty for 125,000 illegal aliens from Haiti
- Late Amnesty, 2000: An amnesty for some illegal aliens who  claim they should have been amnestied under the 1986 IRCA amnesty, an  estimated 400,000 illegal aliens
- LIFE Act Amnesty, 2000: A reinstatement of the rolling Section 245(i) amnesty, an estimated 900,000 illegal aliens 
The largest of these amnesties was the 1986 Immigration Reform and  Control Act (IRCA) which amnestied about 3 million illegal aliens. This  law was supposed to be a compromise – an attempt to finally limit  illegal immigration through strengthened border security and increased  immigration enforcement against employers – combined with amnesty for  the millions of illegal workers in the United States. Illegal immigrants  who had resided in the U.S. for five years and met other conditions  received temporary legal status, which could be later upgraded to  citizenship.
President Ronald Reagan approved this “path to citizenship” amnesty due  to what was believed to be a relatively small illegal immigrant  population. Unlike many current politicians and amnesty proponents,  Reagan called this what it was: amnesty. Unfortunately, there was  widespread document fraud and the number of illegal aliens seeking  amnesty far exceeded expectations. Most importantly, there was no  political will to enforce the law against employers. The 1986 IRCA  amnesty failed and actually led to millions of more people entering the  United States illegally.
While President Bill Clinton made some efforts to combat illegal  immigration during the 1990s, the problem remained. In 1996 the Illegal  Immigration Reform and Immigrant Responsibility Act of 1996 was passed.  Still, leaders from Central American and Caribbean nations relied  heavily on untaxed remittances sent back to their countries from the  United States, and worried that Clinton would support mass deportations.  While at least paying lip service to enforcement of laws, Clinton  assured these leaders that there would be no mass deportations. There  were about 7 million illegal aliens residing in the U.S. when he left  office.
The eight years of President George W. Bush’s administration saw a  marked increase in illegal immigration and a drop in immigration  enforcement throughout much of his tenure. For example, the number of  illegal aliens arrested in workplace cases fell from nearly 3,000 in  1999 to 445 in 2003, with the number of criminal cases against employers  during this period falling from 182 to four. Not surprisingly, by 2005,  there were an estimated 10-20 million illegal aliens living in the  United States. Even at the end of 2007 after the Bush administration’s  enforcement crackdown had been underway; only 92 criminal arrests of  employers had taken place, in an economy that, according to the  Washington Post, includes 6 million businesses that employ more than 7  million illegal foreign workers.
Despite the failure of past amnesties and the fact that these increase  illegal immigration, Bush repeatedly pushed mass legalization (amnesty)  schemes for illegal immigrants using the well-worn line that they “are  doing jobs Americans will not” or “are not” doing. One scheme was the  Comprehensive Immigration Reform Act 2007 which was defeated by  widespread popular opposition.
Today, over 1 million immigrants enter our country legally per year,  while the illegal alien population grows by about 500,000 per year. Most  of those who violate our borders and enter illegally come from Mexico  and other Latin American countries. Only about 6 percent of the illegals  come from Canada and Europe. Close to half of all illegal immigrants  now residing in the U.S. did not enter illegally but rather overstayed  their visas. Just as the federal government has historically failed to  secure its borders, it has concurrently failed to closely monitor visa  holders.
About 12-20 million illegal aliens currently reside in the United  States. California has more illegals than any other state, at about 2.4  million. Others states with high illegal alien populations include  Texas, Florida and New York, although many states are now impacted.
Americans of all backgrounds are still seriously concerned about the  negative impact of illegal immigration, such as with the number of  bankrupted hospitals, overcrowded schools, and increased crime.  Taxpayers pay dearly for this, illustrating the high cost of so-called  “cheap labor” for some unscrupulous employers and their political allies  who for decades have watered down immigration laws. For example, in  California alone, as of 2004 the net cost of illegal immigration to  taxpayers is estimated to be nearly $9 billion annually.
Despite Americans’ opposition to illegal immigration and amnesty, open  border advocates are pressuring President Barack Obama to pass yet  another mass amnesty for illegal aliens. These special interests and  their allies in the mainstream media continually attempt to re frame the  debate away from the core issues (e.g., illegality, sovereignty,  overpopulation, fiscal costs), and redefine the terms used in the  debate. The most common euphemisms for amnesty used by the open-border  lobby are: “comprehensive immigration reform,” “pathway to citizenship,”  “earned legalization,” “guest” or “temporary worker plan,” and bringing  “undocumented immigrants” “out of the shadows.”  Citizens concerned about illegal immigration should also be aware that  pro-illegal alien advocates often offer the false choice between either  mass deportation or mass amnesty. They say that since we can’t “round up  and deport 12 million people” we have to provide them with a “pathway  to citizenship” (i.e. amnesty).
However, there is a common sense, humane and cost-effective way to solve  the problem of illegal immigration, without resorting to either mass  deportation or amnesty. This is called “attrition through enforcement”  wherein if our existing immigration laws are consistently enforced and  jobs cut off, the number of illegal aliens will return to their home  countries over time. This middle-ground strategy is endorsed by real  immigration reform groups such as ALIPAC and NumbersUSA.
You want illegal immigration to stop? MAKE LAW BREAKING BUSINESSES TO STOP HIRING THEM. PERIOD. END OF STORY. No jobs for illegals? No immigration.
For the TL;DR see BOLD