Jeb Bush, the former Republican governor of Florida, says President Obama should stop trying to blame his older brother, former President George W. Bush, for the struggling economy.

"I think it's time for him to move on," Bush said in an interview aired Sunday with NBC's David Gregory

Bush acknowledged that the economy was already in trouble when Obama took office in 2009, but he argued that Obama has had enough time to turn it around.

"I mean, look, the guy was dealt a difficult hand, no question about it. But he's had three years, his policies have failed," Bush said. "Rather than blame others, and I know that we were taught that that was kind of unbecoming, over time, you just can't keep doing that, maybe offer some fresh solutions to the problems that we face. But that's not going to happen between now and election day."

The Obama campaign has argued that the problems inherited from the former administration need more time to address. 

A poll conducted for The Hill last month found that 34 percent of voters blame Obama for the weak economy, compared with only 18 percent who say Bush is still responsible. Twenty-three percent of respondents blamed Congress and 20 percent said responsibility rests with Wall Street.

Bush, the focus of speculation as a future GOP presidential contender, also said he was not thinking about a future run.

"I don't think about it. I'm not motivated by it. It takes an incredible amount of discipline and ambition to even think about aspiring to it and I'm not there yet in my life," he said. "I'm excited about supporting Mitt Romney. He's a great guy."