Republican presidential candidate Mitt Romney recently called President Barack Obama a DDD president following the downgrading of the nation's AAA credit rating to AA+ by Standard & Poor's.

I want to make America the strongest economy on earth, Romney said last week at a campaign stop in Exeter, N.H. What I've seen and said from this president is not a AAA presidency, but I'll call it a DDD presidency. It's been a presidency which has been associated with debt and with downgrade and with delay.

The former Massachusetts governor also took a swipe at Obama for vacationing at Martha's Vineyard.

You've got 25 million people out of work right now, Mr. President, out of work or in part-time jobs needing full-time work or they have stopped looking for work, said Romney. You shouldn't be on the vineyard playing golf. You should be doing your job putting Americans back to work.