Politico has a good overview of the plight of centrist Blue Dog Democrats, including North Carolina’s Mike McIntyre of the 7th Congressional District:

Two years after the 2010 midterm elections decimated their ranks, the coalition of conservative Democrats is poised to get pummeled again in November — moving the Blue Dogs dangerously close to extinction.

Of the 24 remaining Blue Dogs, five are not seeking reelection. More than a half-dozen others are facing treacherous contests in which their reelection hopes are in jeopardy.

It’s a rough time to occupy the right wing of the Democratic Party.

“It’s a tough environment out there,” said former Alabama Rep. Bud Cramer, a longtime member of the House Blue Dog Coalition. “Their numbers are down. Redistricting has not been kind to them.”

Cramer nailed it: Redistricting is at the root of the Blue Dog problem. The once-in-a-decade line-drawing has forced some of them to compete for seats that have become even less friendly to Democrats — and those seats weren’t very friendly to begin with. Utah Rep. Jim Matheson, Georgia Rep. John Barrow and North Carolina Rep. Mike McIntyre are among those who have been thrust into deeply Republican territory after being targeted in GOP-led redistricting efforts in their home states.