Washington (CNN) - President Barack Obama's re-election campaign is spending more than $12 million on its ad hitting Mitt Romney's record as governor of Massachusetts, according to a Republican ad buying source.
The one minute commercial, which started airing Tuesday in 10 battleground states, criticizes Romney for having "one of the worst economic records in the country."
- Follow the Ticker on Twitter: @PoliticalTicker
- Follow Kevin Bohn on Twitter: @KevinBohnCNN
Team Obama has intensified its attacks on Romney's term as governor in the last week pointing out the state lost 40,000 manufacturing jobs and averaged 47th in the nation in job creation.
The spot, which was announced Monday, will be airing for varying durations in the states on both broadcast and cable and follows the campaign's $25 million purchase of ad time in many of the same states for the last month in which it aired mostly positive ads.
- Check out the CNN Electoral Map and Calculator and game out your own strategy for November.
Here is the breakdown by state and duration of the buy:
- Colorado $849,644 (thru 6/15)
- Florida $1,730,064 (thru 6/15)
- Iowa $1,045,074 (thru 6/18)
- North Carolina $1,839,256 (thru 6/15)
- New Hampshire $750,161 (thru 6/22)
- New Mexico $40,650 (cable only thru 6/22)
- Nevada $735,361 (thru 6/18)
- Ohio $2,454,903 (thru 6/18)
- Pennsylvania $1,053,078 (thru 6/22)
- Virginia $2,040,697 (thru 6/22)
Team Romney responded to the Obama campaign efforts saying the president's policies have "failed to get Americans back to work."
"We're happy to compare the 4.7% unemployment rate Mitt Romney achieved in Massachusetts to President Obama's weak record any day," Romney spokeswoman Andrea Saul said in a statement earlier this week.
For its part the Romney campaign has spent just over $5 million in ads in the last month with its latest purchases of commercial time running through last Tuesday.
- CNN Political Editor Paul Steinhauser contributed to this story.