D.C. is like a casino...The House always wins when it needs a nudge. Repubs are the buffer zone for Prog initiatives as there are sleeper agents in the ranks. When a vote is needed and close most of the time it is found, or they purposely vote down other initiatives for the one they want or need to keep moving left.Someone like Romney or Collins would break the tie and go with whom the Dems picked as long as it was not someone too crazy.