Newt Gingrich touts fiscal responsibility among his qualifications for the presidency, but apparently the 2012 GOP contender has a weakness for bling at Tiffany & Co. The former House speaker owed as much as $500,000 to Tiffany's in 2005 and 2006, according to financial disclosures. Though Gingrich retired in 1999, his wife, Callista, was employed by the House Agriculture Committee until 2007 and listed her husband's "revolving charge account" at Tiffany's as part of her personal financial disclosure. Gingrich's spokesman has declined to comment about whether the candidate has paid off his debt. Currently, neither of the Gingriches is required to report a personal-finance-disclosure form, but Newt would have to do so as an official presidential candidate.