Changes to the legislation would bolster rights for same - sex couples . Politically risky legislation threatens to undercut Republican support for larger bill . Most of the activists are backing the reform effort , the aide said . 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 .
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 .