NPR News Now covers a significant Wall Street sell-off driven by AI concerns and midterm election results, alongside reports of Democrats flipping multiple North Carolina congressional seats. The episode also details First Lady Melania Trump hosting Ukrainian and Russian officials to discuss a temporary ceasefire, mass protests in France demanding higher wages, and the resignation of Justice Department official Harmeet Dillon. Additionally, the broadcast features a study on how watching aggression rewires mouse brains and the cutting of this year's Rockefeller Center Christmas tree.