Romney pulling Colorado ads

Mitt Romney's campaign has stated that it's pulling all TV ads from Colorado "until further notice."

Meanwhile, Ann Romney is canceling a 1 PM appearance at a campaign office opening in Michigan.

Barack Obama's campaign hasn't gone quite so far. It's pulling all negative ads, but apparently, not positive ones. I'll be surprised if he doesn't pull all of them soon, especially considering Romney's decision.

UPDATE: Obama is now cancelling all his, as well.