National Journal's annual congressional vote ratings show a breakdown of how Senate members voted in 2010, and who was rated the most liberal and most conservative. Return to graphic and analysis.
Latest cover story: "For Republicans and Democrats Alike, a Stairway to Nowhere" -- The same demographic trends that helped the GOP keep the House will hurt their shot at the presidency. And the trends that propelled Obama to reelection will impede Democrats from retaking the House.
Read this and all of the stories in this week's magazine.