The state Democratic Party is questioning Republican Dan Benishek's character, based on a child support case from 20 years ago.
Dr. Benishek is hoping to take over Bart Stupak's long-held congressional seat.
Monday, the Michigan Messenger reported that, 20 years ago, Benishek tried to hide $100,000 dollars of his income so that it would not be factored into the child support he'd be ordered to pay his ex-wife.
Now Democratic Chair Mark Brewer has questioned Benishek's integrity, saying, "Hypocrisy is always relevant."
A Benishek campaign spokesman says Benishek and his ex simply disagreed on the facts at the time, and that he complied with the judge's orders.
His ex-wife and daughter have both issued written statements through the campaign, calling this story "disgusting," and "tabloid-style politics."
Democrats deny using negative campaign messaging as a strategy in a race where polls show they may be lagging. Benishek faces Democrat Gary McDowell this November.