In the Senate, to nobody's surprise, Sens. Ted Cruz (R-TX) and Mike Lee (R-UT) led the pack with perfect scores of 100 percent. Sen. Rand Paul (R-KY) was in third place with 97 percent.
Senate Minority Leader Mitch McConnell (R-KY) had 87 percent, and Senate Minority Whip John Cornyn (R-TX) had 93 percent. Both face re-election this year.
Nineteen senators -- all Democrats, and not including new senators or those who stepped down in 2013 -- were tied for last place with 0 percent.
In the House, four lawmakers got 100 percent scores: Reps. Trent Franks (R-AZ), Tom McClintock (R-CA), Matt Salmon (R-AZ) and Davis Schweikert (R-AZ). An additional 22 Republicans received scores of 90 to 99 percent.
House Majority Leader Eric Cantor (R-VA) was ranked 131st with 68 percent; Majority Whip Kevin McCarthy was 189th with 53 percent, and Budget Chair Paul Ryan was 70th with 79 percent.