"Comprehensive immigration reform was the subject of much discussion at the start of the 110th Congress. In the 109th Congress, both the House and the Senate passed major immigration bills, but they were never reconciled. During the first session of the 110th Congress, a bipartisan group of Senators developed broad immigration reform legislation with the active involvement of the Bush Administration. Aimed at addressing a host of perceived problems with the U.S. immigration system, this legislation combined border security and interior enforcement provisions with provisions on temporary workers, permanent admissions, and unauthorized aliens. The Senate considered several immigration reform measures (S. 1348, S.Amdt.1150 to S. 1348, S. 1639) in May and June of 2007. On June 28, 2007, the Senate voted on a motion to invoke cloture on S. 1639, which, if approved, would have ultimately brought the bill to a vote. The cloture motion failed, however, on a vote of 46 to 53, and the Senate Majority Leader pulled the bill from the Senate floor. [...] This report discusses immigration-related issues that have seen legislative action or are of significant congressional interest."
CRS Report for Congress, RL34204