Trouble for Democrats: More Senate seats are at risk

McClatchy reports:

Democrats are finding that their path to keeping control of the U.S. Senate this year is getting bumpier.

At least four states where Democrats hold Senate seats that once were seen as fairly safe are now considered in play: Michigan, Iowa, Colorado and New Hampshire.

They join seven states with Democratic incumbents where analysts see decent bets for Republican pickups: Alaska, Arkansas, Louisiana, Montana, North Carolina, South Dakota and West Virginia. Republican presidential nominee Mitt Romney carried all seven in 2012.

The struggle in Blue America.