Mitt Romney won’t go on Medicare, his campaign confirmed Monday, the same day the former Massachusetts governor issued a new line of attack on the issue.

Romney turned 65 on Monday, making him eligible for the program. But his campaign said that he will not enroll in it, choosing instead to keep his private insurance.

The GOP front-runner, however, did spend the day trying to turn the tables on one of Democrats’ most potent lines, charging that it’s President Obama’s policies — not Republicans’ — that would “end Medicare as we know it.”