Comedian Katt Williams was arrested for assault this past weekend in Portland, Oregon, after traveling there to perform on Nick Cannon's "Wild 'n Out" tour. The Wrap reports that Williams assaulted a town car driver after the two got into an argument "over taking him and his dog from the airport to [his] performance in the city." Page Six adds that the driver sustained "swelling and cuts on his face," while Williams left the airport in a different vehicle, performed on Friday night, then got arrested on Saturday. That outlet also notes that Williams "also was arrested on an out-of-state warrant from Georgia" and that he's due to be arraigned on Monday. Williams' arrest comes a month after he won an Emmy for his guest-star appearance on the most recent season of Atlanta.