Who’s the easiest senator to work with across the aisle? Who’s the toughest? The Hill asked all 99 seated senators about their colleagues’ bipartisanship, and the following names — arranged by frequency, from top to bottom — were cited the most.

MOST BIPARTISAN
DEMOCRATS
1. Edward Kennedy (Mass.)
2. Tom Carper (Del.)
3. Chris Dodd (Conn.)
4. (tied) Evan Bayh (Ind.)
4. (tied) Tom Harkin (Iowa)

REPUBLICANS
1. Susan Collins (Maine)
2. Olympia Snowe (Maine)
3. Orrin Hatch (Utah)
4. (tied) Richard Lugar (Ind.)
4. (tied) John McCain (Ariz.)

LEAST BIPARTISAN
DEMOCRATS
1. Patrick Leahy (Vt.)
2. Charles Schumer (N.Y.)
3. Chris Dodd (Conn.)
4. Dick Durbin (Ill.)
5. John Kerry (Mass.)

REPUBLICANS
1. Jim Bunning (Ky.)
2. David Vitter (La.)
3. Tom Coburn (Okla.)
4. Jim DeMint (S.C.)
5. Lamar Alexander (Tenn.)

To read the whole story go to: http://thehill.com/leading-the-news/ranking-senate-partisans-2009-04-20.html