Ryan -- who has since reversed his position on the Medicare cuts -- bashed Obama for enacting them in the Affordable Care Act during his Wednesday address. On Thursday night, Romney repeated the attack.
"His $716 billion cut to Medicare to finance Obamacare will both hurt today's seniors, and depress innovation -- and jobs -- in medicine," the Republican nominee told attendees at the Tampa, Fla. convention.
The savings are wrung by cutting Medicare payments to providers -- primarily hospitals and private insurance companies -- and don't target benefits. They're projected to extend the solvency of the program by eight years. Romney and Ryan pledge to restore the funds.
Cantor's freeze-up underscores the risk facing the Romney campaign in continuing to level the attack, which fact-checkers and traditional journalists have taken the GOP to task for.