Sen. Bill Cassidy says "I don't know" if Trump understands the Senate is a separate body

Republican Sen. Bill Cassidy, who recently lost the primary in his state to a challenger endorsed by President Trump, told "Face the Nation with Margaret Brennan" that he thinks Congress will continue to hold Mr. Trump accountable after he and Sens. Thom Tillis and John Conryn leave, but he added "I don't know" if the president knows the Senate is a separate body from the presidency.