SurveyUSA - 100 US Senator Approval
Obama rules the planet again, +50 points.
Grassley is 16th at +34. The always more polarizing Harkin is in the middle of the pack, +16.
Conrad Burns, up for re-election, is last at -20.
Too many wannabees to list them all. Joe Biden is highest of all those mentioned; Frist and John Kerry (!) are lowest. Remember, this is just home state approval.