Sen. Marco Rubio (R-Fla.) is the make-or-break player for immigration reform as the Senate on Tuesday begins voting to overhaul what is widely viewed as a broken system. [WATCH VIDEO]

Confidence among Democrats that the 1,000-page bill will pass the upper chamber was shaken last week when Rubio said he would not vote for it without changes to border security language — even though he negotiated the original draft.

via Immigration reform hinges on Rubio proposals for border security – The Hill – covering Congress, Politics, Political Campaigns and Capitol Hill | TheHill.com.