Transcript for Paul Ryan Brings His Mom into the Fight Over Medicare
we'll turn now to the race for the white house. It's your voice, your vote. Vice presidential hopeful paul ryan has taken the fight for medicare to florida. He got help from his 78-year-old mom. President obama is not backing down on the issue and abc's david kerley is tracking it all from the white house. Reporter: Traditionally medicare, talking about changes to medicare is an issue that usually favors democrats. Mitt romney and paul ryan want to have this debate because it's a debate they feel they'll win. I want to introduce you to my mom. Yep, that's mom betty. In front of more than 3,000 cheering florida seniors. We have a choice to make. We will lead. Reporter: He went on the offense. Accusing the president of taking $700 billion out of medicare for health care reform. We'll end the raid of medicare and we'll make sure that this board of bureaucrats won't mess with my mom's health care or your mom's health care. Reporter: Their plan to change the health system into a voucher program won't touch anyone over the age of 55. We got to change it or it's going to go broke. Reporter: A supporter, but look at what was overhead. A plane pulling a sign. Paul ryan, keep your hands off of medicare. It could force seniors to pay an extra $640 for their health care. Reporter: The president took another swipe, using a proposal a couple of years ago from his running mate paul ryan to eliminate the capital gains tax, the main tax that romney pays. Here's the kicker, he expects you to pick up the tab. Reporter: The battle of getting romney to release more tax returns, the answer is absolutely not. If you want him to release his tax returns, sign this petition online. They're putting the pressure on romney to release more than two years of returns. Let's bring in our chief white house correspondent jake tapper who's in for george
This transcript has been automatically generated and may not be 100% accurate.