 Live from NPR News in Washington, I'm Shea Stevens. The White House is now facing more questioning about President Biden's health. NPR's Asma Khalid has the latest. There have been calls from some Democrats for Biden to drop out of the presidential race amid questions about his age and his health, though the president insists he's fine and is staying in. At the White House today, Press Secretary Karine Jean-Pierre was asked repeatedly about the president's neurological fitness.