Mitt Romney says he would raise the eligibility age for Medicare.
Romney's effort to show that he's willing to curtail government benefits in the long run came in a major campaign speech today in Detroit that was otherwise short on new policy ideas.
Speaking to a crowd of about 1,200 people -- who occupied just a portion of the field in the stadium where the Detroit Lions play football -- Romney walked through much of the economic plan he had already unveiled Wednesday ahead of a GOP debate.
He's proposing 20 percent cuts to the marginal individual tax rates. He also wants to lower corporate tax rates to 25 percent from 35 percent.
Today, he said he wants to raise the Medicare eligibility age by one month per year, and eventually tie it to life expectancy.
Romney is facing an unexpectedly tough challenge from Rick Santorum in Romney's native state of Michigan, which holds its primary next week. Santorum has been emphasizing his blue collar roots and looking to appeal to tea party and social conservative voters in Michigan.