Rick Santorum delivered a scathing critique of Mitt Romney and President Obama's healthcare reform laws on Monday.

In a speech billed as a major address on the issue, Santorum said there was virtually no daylight between Obama's healthcare reform law and the law Romney signed as Massachusetts governor.

"I really don't find any legitimate reason why [Romney] would oppose [Obamacare], because the plan he put together in Massachusetts is in fact Obamacare on the state level," Santorum said Monday in Rochester, Minn.,
according to CNN.

Santorum said because of this, the former Massachusetts governor should not be the Republican presidential nominee.

The Massachusetts' law contains an individual mandate provision, similar to Obama's law, that is despised by conservatives. But Romney has repeatedly vowed to repeal Obama's law if he's elected president and defended the law he signed as governor, saying it was right for the state.

In his speech, Santorum also praised House Budget Committee Chairman Paul Ryan's (R-Wis.) budget proposal. He criticized Obama for not embracing Ryan's plan to change Medicare into a voucher system for Americans under 55.

"This is a plan that President Obama says is the equivalent of throwing Grandma off a cliff," Santorum said, according to Talking Points Memo.