The Politico asked John McCain Wednesday how many houses that he and his wife owned:

Sen. John McCain (R-Ariz.) said in an interview Wednesday that he was uncertain how many houses he and his wife, Cindy, own.

“I think — I’ll have my staff get to you,” McCain told Politico in Las Cruces, N.M. “It’s condominiums where — I’ll have them get to you.”

The correct answer is at least four, located in Arizona, California and Virginia, according to his staff. Newsweek estimated this summer that the couple owns at least seven properties.

Obama pounced on McCain’s inability to identify how many houses he owns:

“Somebody asked John McCain, ‘How many houses do you have?’ And he said, ‘I’m not sure, I’ll have to check with my staff,'” Obama said with a tone of incredulousness at an outdoor event.

“If you don’t know how many houses you have, then it’s not surprising that you might think the economy is fundamentally strong,” he said. “But if you’re like me, and you got one house, or you are like the millions of people who are struggling right now to keep up with their mortgage so they don’t lose their home, then you might have a different perspective.”

The Democratic National Committee produced this cute little graphic of the locations of John McCain’s homes.