Yesterday on Meet the Press, Mitt Romney suddenly decided to say he wouldn't repeal all of Obamacare:

Mitt Romney says his pledge to repeal President Barack Obama's health law doesn't mean that young adults and those with medical conditions would no longer be guaranteed health care.

The Republican presidential nominee says he'll replace the law with his own plan. He tells NBC's "Meet the Press" that the plan he worked to pass while governor of Massachusetts deals with medical conditions and with young people.

After spending an entire convention not mentioning Romneycare, Mitt Romney has suddenly decided that he needs to mention Romneycare. This is probably because the public has finally realized—thanks to some excellent messaging work at the Democratic Convention—that Obamacare has some important benefits.

And for the rest of the day, yesterday, the Romney campaign was forced to vacillate on that statement. He's been promising since late last year to repeal all of Obamacare on his first day in office, and that was an important selling point for a lot of teabaggers who were wary about embracing Romney as a candidate in the first place. Those teabaggers must've freaked out at Romney's MTP statement, because the Romney campaign walked it back at the friendliest of friendly Republican outlets:

A Romney aide told the National Review that [Romney] does not support the Affordable Care Act's ban on discriminating against people with pre-existing conditions, despite suggesting on "Meet the Press" that he supported that part of the law.

That aide then said that the marketplace would take care of people with preexisting conditions, and that government intervention wasn't necessary.