President Barack Obama's campaign says Mitt Romney's economic promises didn't pan out when he was governor of Massachusetts and "won't work now."

In a new television advertisement released Monday, the campaign blames Romney for leaving Massachusetts in debt and among the lowest-ranking states in job creation. The ad tells voters that when Romney says what he would do as president, "remember, we've heard it all before."

The ad is part of the targeted effort the Obama campaign launched last week to seek to discredit Romney's economic record in Massachusetts. It comes as the Obama campaign grapples with its own economic message to voters following an uptick in the nation's unemployment rate to 8.2 percent.

Romney spokeswoman Andrea Saul, responding to the ad, said the Republican nominee would be happy to compare the 4.7 percent unemployment rate in Massachusetts during his term as governor with Obama's record on the economy.

"It's time for a president who has worked in the real economy and understands how to get this economy moving again," Saul said.

The Obama campaign says the 60-second ad will air in nine battleground states, including Florida, Ohio and Pennsylvania.