Medicare is a hot topic in the presidential race since Mitt Romney picked U.S. Rep. Paul Ryan to be his running mate.

Ryan, R-Wis., is the head of the Budget Committee in the U.S. House of Representatives and the architect of a plan to dramatically restructure Medicare.

Ryan’s plan is for people who are under age 55 now. It would give them voucher-like credits to buy traditional fee-for-service Medicare or competing private insurance plans. (The credits are sometimes called "premium support.")

Though House Republicans voted overwhelmingly for Ryan’s plan, pollingshows public opinion is mixed, and Democrats have vigorously attacked the proposal as a voucher plan and worse. The Romney campaign, meanwhile, refutes those charges by saying President Barack Obama has targeted Medicare himself.

Here’s how Romney put it in an interview with 60 Minutes shortly after selecting Ryan:

"There's only one president that I know of in history that robbed Medicare, $716 billion to pay for a new risky program of his own that we call Obamacare."

Here, we’re checking whether Obama "robbed" Medicare of $716 billion dollars to pay for Obamacare.