2010: Voted for the DREAM Act amnesty, which would have rewarded illegal aliens with amnesty.
The DREAM Act would have granted amnesty to illegal aliens under the age of 30 who have been in the United States for five consecutive years and came illegally to the United States before the age of 16. Such a reward for illegal immigration serves as an incentive for more illegal immigration. Fortunately, the DREAM Act did not pass.

2009-2010: Cosponsored AgJOBS, which rewards illegal immigration by granting amnesty (Berman).
Rep. Costa cosponsored H.R. 2414, which encourages more illegal immigration by rewarding certain illegal aliens who work in agriculture with amnesty. Rep. Howard Berman (D-Calif.) was the main sponsor of this bill.

2009: Voted against allowing consideration of verification amendments to the health care reform bill Rep. Costa voted in favor of the rule to H.R. 3962, the Affordable Health Care for America Act. Despite high publicity about the big loopholes in the bill allowing illegal aliens to participate in many parts of the new federal healthcare plan, the Rules Committee brought a rule to the House floor that blocked a vote on any amendment giving the Members a chance to close the loopholes. NumbersUSA notified the Members of Congress that a vote FOR the closed rule would be graded as a vote to provide rewards and incentives for illegal immigration. In particular, the rule prevented the House from considering the Heller, Deal, and Wilson verification amendments to the bill. By supporting the rule, Rep. Costa signaled his/her support of a health bill that creates rewards or incentives for illegal immigration. The rule passed 242-192 (7 Nov. 09; 1:33 PM).

2009-2010: Cosponsored AgJOBS, which rewards illegal immigration by giving illegal agricultural workers blue card status (Berman).
Rep. Costa cosponsored H.R. 2414 to reward illegal immigration by protecting illegal aliens granted temporary resident status and later giving them and their families full residency. Rep. Howard Berman (D-Calif.) was the main sponsor of this bill.

2009-2010: Voted against an amendment to deter illegal immigration and drug smuggling by removing lookout posts for smugglers.
Rep. Costa voted against the King amendment (250) to H.R. 2892, the 2010 DHS appropriations bill. This amendment requires Immigration and Customs Enforcement to remove the lookout posts constructed by drug smugglers, thereby making it more difficult for drug smugglers and reducing illegal immigration associated with illegal drug activity. This amendment passed 240-187-1. Rep. Costas vote was one to continue allowing illegal drugs and aliens across our border.

2009-2010: Voted for an amendment to require DHS contractors to use E-Verify.
Rep. Costa supported the King amendment (253) to H.R. 2892, the DHS appropriations bill. The amendment requires all DHS contractors and subcontractors to use the E-Verify system to verify the employment eligibility of their employees. The King Amendment would have essentially implemented an Executive Order signed by President George W. Bush requiring all federal contractors to use E-Verify that has continually been postponed by President Obama. Use of E-Verify is one of the most effective tools at keeping illegal aliens out of U.S. jobs. The amendment passed 349-84, and the bill was signed into law October 28th, 2009.