Paul ranked third among all senators with a 97 percent score in 2013, while Rubio ranked 12th at 91 percent.
Another potential 2016 GOP candidate, Rep. Paul Ryan (R-Wis.), scored considerably lower. The architect of the bipartisan budget last year — a budget the club opposed — scored 79 percent, good for 70th overall but still in the top one-third of all House Republicans.
Four of Ryan's House colleagues — including three Arizonans — received perfect scores. They are Reps. David Schweikert (R-Ariz.), Matt Salmon (R-Ariz.), Trent Franks (R-Ariz.) and Tom McClintock (R-Calif.).
Among the other notable scores:
- Senate Minority Leader Mitch McConnell (R-Ky.), who is receiving a challenge from the right, ranked 15th out of 45 Senate Republicans with a score of 87 percent — just above his 85 percent lifetime score.
- Another primary target, longtime Sen. Thad Cochran (R-Miss.), had the third-lowest score among Republicans, at 56 percent. The club is supporting his primary opponent, state Sen. Chris McDaniel (R).
- A third primary target, Sen. Pat Roberts (R-Kan.), ranked 19th with an 84 percent — significantly higher than his lifetime score of 74 percent.
- Rep. Paul Broun (R-Ga.) continues to be the highest-scoring Republican in the Georgia GOP Senate primary, at 97 percent, good for 13th overall. Rep. Phil Gingrey (R-Ga.) scored a 93 percent, and Rep. Jack Kingston (R-Ga.) scored an 87 percent. All three are running, among other candidates.
- The lowest-scoring Republican in the House: Rep. Michael Grimm (R-N.Y.), who made news recently by threatening to throw a TV reporter over a capitol balcony. Grimm later apologized.