If Majority Leader Harry Reid (D-Nev.) were to lose his re-election bid this fall, Durbin and Schumer are all but certain to duke it out to succeed him. And that likely contest would open up the No. 2 spot regardless of who prevailed since, knowledgeable Democrats say, neither Durbin nor Schumer would want to serve as the other's Whip," Roll Call writes. "Conference Secretary Patty Murray (D-Wash.) would be a natural to move up in the ranks, but sources said she is unlikely to escape a challenge for Whip. Top among the possible contenders: Democratic Senatorial Campaign Committee Chairman Bob Menendez (N.J.), the ambitious junior Senator who jumped into leadership after just three years in the chamber."