NationalJournal.com - Vote Ratings 2010
In the following list, members and senators are assigned separate scores for their roll-call votes on key economic, social, and foreign-policy issues during 2010. The senators are rated in each of the three issue categories on both liberal and conservative scales, with the scores on each scale give as percentiles. An economic score of 87 on the conservative scale, for example, means that the senator or member was more conservative than 87 percent of his or her colleagues on the key votes in that issue area during 2010. Composite scores are calculated based on the issue-based scores. Members with the same composite scores are tied in rank. (Note: Several members did not cast enough votes to achieve a composite score.)