The John McCainJohn Sidney McCainRomney forced into GOP primary for Utah Senate nomination Trump considering pardon for boxing legend after call from Sylvester Stallone GOP poised to advance rules change to speed up Trump nominees MORE campaign owes American Express $1.37 million in credit card debt and fees, according to Federal Election Commission filings.

A memo from the Democratic National Committee mocked the number, claiming "the campaign is taking its cues from the McCain's personal finances."

In June the McCain's reported more than $100,000 in personal credit card debt. Reports on Cindy McCain's personal finances have shown the beer heiress has charged as much as $500,000 in one month on an American Express card.