(CNN) - Republican presidential candidate Mitt Romney drew clear lines between himself, President Barack Obama and rival candidate Rick Perry over Social Security.
While laying out his plan to reform the entitlement program Wednesday, the former Massachusetts governor criticized what he sees as a nonexistent plan from the president and an unfeasible plan proposed by Texas Gov. Perry.
"So those are the three models, one is the president's, which is to say something needs to happen but I'm not willing to tell you anything about how to do it, number two is that of Gov. Perry that says, look send it back to the states," Romney said at a town hall in Miami. "And number three is the plan I proposed, which is to say look, we're not going to raise taxes, we're going to slow the rate of inflation down and in calculating the benefit of high income Social Security recipients and overtime we'll increase the retirement age by a modest amount."
Romney and Perry have clashed over plans to reform the program, most recently at the CNN/Tea Party Republican debate, when Romney took specific aim at Perry's comments in his book "Fed Up!" In the 2010 book, Perry characterized the plan as "unconstitutional" and a "Ponzi scheme."
Romney also said he disagrees with Perry's suggestion that individual states take control of Social Security.
The 2008 Republican presidential candidate, who is making his second bid for the White House, stepped up his attacks at Wednesday's event explaining what he sees are the failures of removing the federal government from the equation.
"In my opinion this thing does not work in any way, shape or form," Romney said. "I can't see anything which suggests it makes any sense whatsoever to end Social Security as a federal entitlement and send it back to the states."
Romney said Perry's plan raises a series of other questions, which he released in a press statement earlier in the day, including how individuals would move to other areas of the country and if states could forgo a pension program all together.
Perry Campaign Spokesman Ray Sullivan responded to Romney's comments in a press release, saying that while Romney has been running for office, Perry has proposed a plan that will protect the program for future generations.
"Rick Perry and other conservatives are courageous enough to be honest about federal spending and entitlements, whether Mr. Romney and the liberals like it or not," Sullivan said. "Gov. Perry has been clear that he will protect benefits for those at and nearing retirement, and work with citizens, experts and elected leaders to fix Social Security financing for future generations."