 The pressure mounting on President Biden to drop out of the race. Questions about his age have more members of Congress and donors urging him to quit. The president will be campaigning in Pennsylvania today. The heat dome tightens its grip. More than 125 million Americans under heat alerts. Brutal temperatures, dry conditions fueling more wildfires in California. The lake fire in Santa Barbara County now burned more than 12,000 acres. This is ABC News.