Callista Gingrich filed ethics disclosures in 2006 and 2007 that indicated she or her husband owed anywhere from $250,000 to $500,000 to Tiffany & Co. House ethics rules require disclosures of debt more than $10,000 and allow aides to report the figures in broad ranges.

The ethics form also indicated she or her husband owed between $15,000 and $50,000 to American Express.

A spokesman to Gingrich, a former House speaker who left office in 1999, did not immediately respond to a message seeking details about the debt, which was first reported by Politico.

Callista Gingrich was a clerk with the House Agriculture Committee until 2007. The most recent report on file says the couple had between $1 million and $2.5 million in assets during 2006.