If elections were popularity contests....
SurveyUSA has come out with a new 50 state tracking poll measuring the popularity of each of the 100 U.S. Senators. Who is the least popular in the country? Rick Santorum, with a 39% approval rating. Who's 49th? Conrad Burns.
By the way, I previously noted the strange paradox that Republican governors in blue states and Democratic governors in red states are more popular than ideologically consistent state governors (i.e. Dem governors in blue states).
However, no such trend exists with senators it seems. I did a similar analysis and found that "cross-party" senators (i.e. Republican senators in blue states) have a net approval of 14%, but "same-party" senators have a net approval of 18%.