In a comment on a post yesterday, Tim Zank pointed to a new Rasmussen poll showing Evan Bayh doing poorly in matchups against announced Republican candidates, and even losing by three points against Mike Pence, whom Republicans are urging to run. That's an astonishing indication of how quickly the Brown effect is moving through political circles, and many news outlets have picked up on the poll today. Political analyst Michale Barone has a lengthy column on Bayh's problem: