 ABC's Morgan Norwood in New York. President Biden continues to isolate at home with COVID as calls grow for him to drop out of the race. Former President Trump, meantime, holding his first campaign rally since last weekend's assassination attempt, appearing with his newly announced Republican running mate, J.D. Vance, later today in Grand Rapids. Mourning the death of Texas Congresswoman Sheila Jackson Lee, she died late yesterday at 74. This is ABC News.