Florida Sen. Marco Rubio stars in the latest Romney campaign ad announced Thursday in which he explains the Romney-Ryan Medicare plan: change Medicare for future generations in order to preserve it for today's retirees. Rubio doesn't mention in the ad how Medicare change.

Rubio talks up his own mother in the ad, saying she is 81-years old and depends on Medicare. “We can save Medicare without changing hers, but only if younger Americans accept that our Medicare will be different than our parents’, when we retire in thirty years," Rubio explains. "But after all they did for us, isn’t that the least we can do?”

Watch: