Romney: Gingrich 'changed his view' on individual mandates

"I'm familiar with the fact that he supported individual mandates in the past and was supportive ... generally of the plan we had in Massachusetts, and he's changed his view in the election year," Romney told reporters.

Two reports surfaced Tuesday that showed the former House Speaker in support of universal healthcare and an individual mandate, including a 2006 newsletter and a speech at the Alegent Health Clinic in 2008.

The Wall Street Journal reported Tuesday that Gingrich offered the favorable assessment of the healthcare measure Romney signed into law as governor of Massachusetts — including its invidual mandate — in an April 2006 newsletter published by his Center for Health Transformation. 

"We agree entirely with Gov. Romney and Massachusetts legislators that our goal should be 100 percent insurance coverage for all Americans," the newsletter says.

The individual mandate was the centerpiece and most controversial aspect of President Obama's healthcare law, which has been blasted by Republicans — including Gingrich — as government overreach.

Romney has come under fire throughout the campaign for signing the Massachusetts law.

Opponents of Romney have aimed to link the former governor's Massachusetts legislation to the national healthcare reform enacted under Obama.

All of the prominent Republican candidates have said they would repeal Obama's healthcare law if elected to the presidency.

— Jonathan Easley contributed.