 Published reports say four high-ranking Democrats, including New York Congressman Jerry Nadler, are calling for President Biden to drop out of the race. They made their comments in a virtual meeting Sunday discussing the president's mental fitness. South Carolina Senator Lindsey Graham on CBS' Face the Nation says candidates should take a cognitive test. All nominees for president going to the future should have neurological exams as part of an overall physical exam. I think people in the line of succession should have a neurological exam.