Mace also accused Walz of “presiding over one of the worst government fraud scandals in American history" during the spat. Rep. Nancy Mace (R-S.C.) hit Minnesota Gov. Tim Walz (D) with a signature strange question during a heated exchange at Wednesday’s House Oversight Committee hearing about alleged welfare fraud in the state. The spat came after Mace accused Walz and Minnesota Attorney General Keith Ellison of “presiding over one of the worst government fraud scandals in American history.”