7. Rep. Jason Altmire (D-Pa.) vs. Rep. Mark Critz (D-Pa.): Conventional wisdom has settled around these two Democrats being combined into one western Pennsylvania district. That’s because Republicans control the redistricting process, and they need to nix one seat. Critz’s team appears to be putting out word that he may challenge Rep. Bill Shuster (R) in a more rural southern Pennsylvania district instead — the idea being that Critz did well in many parts of what would be Shuster’s new district. That’s a good strategy for him, because it may force Republicans to draw the combined Critz-Altmire district in Critz’s favor. The matchup is intriguing, because both men are firmly on the conservative end of the Democratic Party.