WASHINGTON (CNN) -- The Democratic Party on Monday filed a lawsuit against the Federal Elections Commission seeking to force the group to investigate whether Sen. John McCain has violated federal spending limits for his primary campaign.
The lawsuit, which was filed in the United States District Court in Washington, is the latest move by the Democratic National Committee that seeks to prove the Arizona senator locked himself into campaign spending limits earlier this year.
The DNC claims McCain did so when he used the prospect of $6 million in federal matching funds as collateral for a December bank loan to his campaign.
