A Democratic congressman who has previously said he would file a legal challenge if Ted Cruz is on the presidential ballot announced Wednesday he has additional proof of maple leaf menace.

"We found that his mother was on a Canadian voter list which strongly suggests she was a Canadian citizen," Rep. Alan Grayson, D-Fla., told listeners of the Alan Colmes show. "There's no other way to get on a Canadian voter list and if she was a Canadian citizen, and if she took the oath of citizenship voluntarily, then that means she lost her U.S. citizenship."

But Grayson's interview did not hit on whether Cruz's mother had dual citizenship since she was an American citizen. If she was a citizen of both countries, she would have been permitted to vote in both nations' elections.

The Florida representative said in November he would file a legal challenge over Cruz's citizenship if the Texas senator wins the nomination and would refile if he wins the election.

Cruz, ranked second in the Washington Examiner's presidential power rankings, was first attacked over his citizenship by Donald Trump when the billionaire was asked about it in an interview.