 Fox News, I'm Therese Crowley. The White House producing a letter from President Biden's physician after the White House visitors' log showed a neurologist specializing in Parkinson's visited the White House residence eight times in eight months. The doctor's letter insists Biden has not seen a neurologist outside his physicals. President Biden rejecting calls to withdraw from the presidential race as he prepares to host the NATO summit in D.C. Candidate Donald Trump tells Fox's Hannity...