The Senate has approved the long-awaited immigration reform bill that creates a path to citizenship for millions of undocumented immigrants while imposing unprecedented new measures for border security. Fourteen Republicans joined a united Democratic caucus to pass the bill by a vote of 68 to 32. It includes an amendment that radically expands enforcement along the U.S.-Mexico border, spending $46 billion to nearly double the number of border agents to 40,000, expand the use of drones, and construct around 700 miles of border fencing. The measure now faces an uncertain fate in the House, where Speaker John Boehner says he will not allow a vote without the majority support of Republican members.