 The Biden campaign has announced a new $50 million ad buy. More evidence. President Biden intends to stay in this race. Ahead of November's election, NATO nations are prepping for a potential shift in U.S. leadership. Fox's Jennifer Griffin has the latest from the Pentagon. The rise of populist nationalist movements in Europe and increased isolationism here in the U.S. puts NATO at a crossroads, with European allies scrambling to prepare for a possible Trump presidency.