- Latter Day Saint - 6 - Mike Crapo (R-Idaho), Orrin Hatch (R-Utah), Dean Heller (R-Nevada), Mike Lee (R-Utah), Harry Reid (D-Nevada), Tom Udall (D-New Mexico) (4 Republicans, 2 Democrats).
A basic search reveals that there are about 6M Mormons in the US. This isn't terribly far from the number of Jews in the US, which would yield 2 senators with normal representation. As it is, there are 6 Mormon Senators, so they're managing approximately a 3x overrepresentation.
Definitely a decidedly mixed set of grades, everything from F- to A+. Mormon republicans range from A+ to C+, Mormon democrats are uniformly F-. But Mormons definitely have the best average thus far. Too bad Reid wasn't knocked off in the last election in Nevada---the MSM really brought big guns to defend him against the upstart Sharon Angle. Interestingly, Udall F- and Heller, A+ are from the same state (New Mexico). Romney, with his C rating (sadly the 2nd best on the Republican candidates for President, only Bachmann has a better rating) is on the low end for Mormon Republicans but clearly better than Mormon Democrats. Can't we do better than this guy? Apparently not, he's better than Perry or Gingrich, and Paul, while not ideologically hostile to us, is opposed to the only mechanisms that would be proven to work.
- Presbyterian - 15 - Lamar Alexander (R-Tennessee), John Barrasso (R-Wyoming), Thomas R. Carper (D-Delaware), Dan Coats (R-Indiana), Chris Coons (D-Delaware), Bob Corker (R-Tennessee), Jim DeMint (R-South Carolina), Michael Enzi (R-Wyoming), Kay Hagan (D-North Carolina), James Inhofe (R-Oklahoma), Jon Kyl (R-Arizona), Rand Paul (R-Kentucky), Jay Rockefeller (D-West Virginia), Richard Shelby (R-Alabama), Mark Warner (D-Virginia) (10 Republicans, 5 Democrats).
Coats (No Grade but career D)
Paul (Rand) B-
Another really mixed batch, 6 B+'s, which are among the best grades any presidential candidate has gotten recently, 3 B-, a C- , 3 F- grades, a D, and a D+.
Hagan has the best grade for a Democrat here, at C-, Rockefeller the worst for a Republican at D+. Overall this group has a considerably better immigration record than I'd expected to find for a fairly mainline denomination (9 B grades, 1 C, 2 D's and 3 Fs)
- Episcopalian - 4 - Saxby Chambliss (R-Georgia), Kay Bailey Hutchison (R-Texas), Bill Nelson (D-Florida), Sheldon Whitehouse (D-Rhode Island) (2 Democrats, 2 Republicans).
Nelson D- (note that there is ANOTHER B. Nelson in the senate, from NE, who is also a Democrat who has a B+)
2 B+ grades, a D-, and one F-. This actually surprised me somewhat---I expected this group to have a much worse record considering how elite and SWPL mainline the Episcopalian denomination is on the whole. But you've got the usual breakdown of Republicans in the B to A range and Democrats in the D to F range.