The Obama campaign has filed a complaint in federal court to halt an alleged GOP plan to challenge Michigan voters whose registration is linked to a foreclosed home, or a home in the process of foreclosure.

A member of the Macomb County Republican Party tells the Detroit Free Press that last week's report alleging the tactic, which appeared on the political news website the Michigan Messenger, was unfounded. He says the Michigan GOP does plan to send thousands of challengers to polling places on Election Day, but they won't base their challenges on foreclosure lists.

Obama attorney Bob Bauer dismisses the Republican denials. He told Michigan Radio:

"It is not only in Michigan we're seeing this, because this is consistent with a pattern and practice of the Republican Party across the country, as it has been their pattern and practice for decades. And, we have seen the same indication of the use of foreclosure lists in the state of Ohio."

Michigan Radio also reports that a Macomb County GOP official is threatening a libel suit against the Michigan Messenger.