 But looming over this NATO summit are questions about the future of this unity given the uncertainty around the U.S. presidential election. The presumptive Republican nominee, Donald Trump, has repeatedly raised questions about the U.S. commitment to the alliance. Asma Khalid, NPR News. And congressional Democrats are still divided over whether President Biden should stay on the ticket. House Democrats held a meeting this morning on the topic. Representative Mike Quigley is one of six Democrats calling on Biden