Interesting. Yesterday I was talking to a Republican about the dramatically changed landscape after the Scott Brown win, and he mentioned a few Democratic seats that looked safe not too long ago, but that now might be in the “maybe we could win” category. He asked, “Can we look more seriously at D-plus districts — maybe against a Joe Courtney in Connecticut, a Chellie Pingree up in Maine, an Adam Smith in Washington state, a John Barrow in Georgia — districts that are marginally Democrat historically?”

This morning, Chellie Pingree just picked up her first Republican challenger, businessman Dean Scontras. He lost in the primary in 2008.