Changes to the legislation would bolster rights for same - sex couples . Politically risky legislation threatens to undercut Republican support for larger bill . Legislation would create a new path to citizenship for most undocumented immigrants . Critics of the bill have been hoping to win as many as 100 votes in the Senate .
Amendments to immigration legislation would bolster rights for same-sex couples . Politically risky move threatens to undercut Republican support for larger bill . Legislation would create a 13-year path to citizenship for most undocumented immigrants . Backers of the bill have been hoping to win as many as 70 votes in the Senate .