Interesting tidbit. As you may know, the Congress is preparing to pass a bill that would increase the House to 437 reps permanently, adding 1 for DC and 1 for Utah. The Utah seat would be at-large until post-census redistricting (and reapportionment) in 2010. The interesting effect is on the electoral college. DC already gets 3 EV, and would not get any more under the 23rd amendment ("...but in no event more than the least populous state"). But Utah's EV would be calculated by adding the total number of reps + senators. So Utah would get +1 EV (increase from 5 to 6). This means there would be 539 EV available, not 538.