Brian Musgrave, one of the four men Mace accused of filming acts of sexual assault in a House floor speech last month, sued Mace for libel and defamation in federal court.

One of the men Rep. Nancy Mace (R-SC) accused of sexual abuse in a fiery speech on the House floor last month is suing the congresswoman for defamation, a test of legal rules that members of Congress say protect remarks in the chamber.

South Carolina Rep. Nancy Mace was slammed for “lies” in a defamation lawsuit filed by the man she called a “predator,” setting up a potential legal fight over free speech privileges granted to Congress members.