And the bipartisan immigration bill survived another round of challenges in the Senate Wednesday with new restrictions on undocumented workers. Senators defeated amendments that would have disqualified hundreds of thousands of workers from obtaining visas. But senators also rejected measures that would have granted visas to hundreds of thousands of relatives of U.S. citizens and green-card holders. The Senate also voted to end to a proposed guest worker program after five years, just days after it voted to cut the size of the program in half. Senators also adopted amendments that would make English the national and “common” language of the U.S., deny immigrant workers tax credits, and block Social Security benefits to workers who stay past their visa date. A final Senate vote could come tomorrow.