With the appointment of Dean Heller to fill the resigning John Ensign’s absence, there will now be six Latter-day Saints serving in the U.S. Senate.
Heller will be the sixth LDS Senator in the current Congress, while his upgrade will lower the number of Mormons in the House to only nine (assuming these data from Pew are correct and up to date). There are also 12 Jewish Senators, compared to 27 Jews in the House. Combined total: 18% . Both of course are massively overrepresented compared to their population in the nation as a whole, where both are just at 1.7%.