Survey USA ranked every Senator in the U.S by approval in their home state. If you click on their name at the site below you can see the rankings across demographics for each Senator
http://surveyusa.com/100USSenatorApprovalRatings061305.htmThe following have a higher approval with the opposing party than their own party
Johm McCain AZ 69% among Republicans 71% among Dems, ranks highest among moderates, lowest among conservatives
Bill Nelson's FL approval is 49% among both Reps & Dems, but disapproval among Reps is lower 26%, compared to 32% among Dems, Nelson ranks higher among conservatives & moderates than he does with liberals
Olympia Snowe ME 65% among Republicans 80% among Dems
Susan Collins ME 68% among Republicans 78% among Dems
Arlen Specter PA 57% among Republicans 58% among Dems
Lincolin Chafee RI 45% among Republicans 53% among Dems