 Fox News. I'm Therese Crowley. President Biden sends House Democrats a two-page letter refusing to step aside after four more top Democrats, including Jerry Nadler, called for Biden to withdraw from the presidential race over mental fitness concerns. President Biden hosting a NATO summit in D.C. this week. Senator Lindsey Graham tells CBS... This is a very dangerous time. I do not believe. I like President Biden. But what I've seen, I am very...