Add one more to the list of potential Democratic open seats in the House to be filled by special election soon: CA-31 in downtown Los Angeles. Xavier Becerra, House member since 1992, has, in something of a surprise pick, been asked by the Obama administration to be U.S. Trade Representative. (Anonymous sources seem to conflict over whether or not he has already accepted.)
A vacancy in the Fightin' 31st will not pose much of a threat; it's D+30 and 70% Hispanic. State Senator Gilbert Cedillo (SD-22) seems to overlap much of this same turf, but this is also the turf of former Assembly Speaker Fabian Nunez (AD-46), who was just term-limited out of his Assembly position and may well be looking for something new to do.
If anything, the interesting fight over the musical chairs will be in the House leadership, where Becerra was just elected vice chair of the Democratic caucus, the #5 role on the leadership totem pole, possibly meaning more reshuffling involving Chris Van Hollen ditching the DCCC to become vice-chair, or perhaps Debbie Wasserman Schultz leapfrogging into the job, or perhaps another challenge by Marcy Kaptur (who was defeated by Becerra for the job several weeks ago).