Republican Representative Michele Bachmann is being probed by the Office of Congressional Ethics for allegedly misusing campaign funds, media reports said on Monday.
Bachmann, a Tea Party-backed conservative congresswoman from Minnesota was among a large field of Republicans who ran unsuccessfully for their party's presidential nomination before last year's election.
She is being investigated over alleged violations of campaign finance rules, according to the Daily Beast, which first reported the story, citing a former Bachmann campaign staffer.
"There are no allegations that the congresswoman engaged in any wrongdoing," William McGinley, a lawyer representing the Minnesota Republican, said in an emailed statement.
"We are constructively engaged with the OCE and are confident that at the end of their review the OCE Board will conclude that congresswoman Bachmann did not do anything inappropriate," the statement said.
The Office of Congressional Ethics is an independent, non-partisan body that reviews allegations of misconduct against staff and members of the House of Representatives.