In an ad titled "Mosaic", the Obama team contends that Romney raised more than 1,000 taxes while running Massachusetts. The ad says Romney's fee hikes totaled $1.5 billion.
A second ad titled "Come and Go" seeks to link Romney's record in the private sector with his tenure as governor. The ad says that in both roles, Romney moved jobs overseas and implies he may do the same as president.
Romney's campaign calls the ads "misleading" and an attempt to distract from Obama's "failed policies."
The ads are running in nine battleground states, including Florida and Ohio.