 Doug Sovereign for CBS News Milwaukee. Donald Trump is set to formally accept his party's nomination tonight. President Biden is sidelined with COVID. Aides say his symptoms are mild. He's self-isolating at home in Delaware as another top Democrat, California Congressman Adam Schiff, calls on him to drop out of the race. CBS's Nicole Killian. In a statement to CBS News, Schiff calls Mr. Biden one of the most consequential presidents in history.