Democrats are waiting on former Rep. Joe Sestak (D-Pa.) to decide on whether he will mount a comeback bid in his old district before deciding on a run against freshman Rep. Pat Meehan (R-Pa.), according to

Sestak has proven an able campaigner, winning a tough race in 2006 and beating party-switching Sen. Arlen Specter (D-Pa.) in 2010 by a wide margin in the primary before narrowly losing to Sen. Pat Toomey (R-Pa.) in a tough year.

He would likely be Democrats' strongest recruit in a district GOP legislators turned from Democratic-leaning to Republican-leaning in redistricting. But because the district has been greatly altered geographically and Sestak ran statewide last year, he might be better known district-wide than Meehan.

Republicans made many of their swing seats in Pennsylvania safer in redistricting. If Democrats hope to win back the House any time soon, they will need to win seats like this despite their new red hues.