WASHINGTON (AP) – Get in line, Medicare and Social Security. Seniors, like just about everyone else, have money on their minds.

Who wins the trust of seniors, a group that votes at a higher rate than any other, will be a deciding factor in the presidential election. That should be good news for Mitt Romney, because those 65 and older have backed the Republican candidate in both of the last two presidential elections.

But President Barack Obama has been pounding Romney and his running mate, Rep. Paul Ryan, on their plan for Medicare. Those attacks are starting to bear fruit for Obama, who is gaining ground among seniors in two key battlegrounds: Florida and Ohio.