Barack Obama pledged support for Kamala Harris on Friday, filling the last major gap in her bid to unite Democrats around her dramatic presidential election run, while Donald Trump announced he will revisit the scene of his near-assassination. The boost for the vice president from both Barack and Michelle Obama came as 78-year-old Trump urged supporters in a social media post to "FIGHT, FIGHT, FIGHT!" Trump is scrambling to reorient an election he thought would be against President Joe Biden, an 81-year-old incumbent beset by concerns over his mental acuity. He now finds himself the oldest presidential nominee in history and facing an energized replacement, two decades younger.

Just last week, Trump was riding high as he accepted a hero's welcome -- and the official nomination -- at the Republican convention in Milwaukee. This came a week after a gunman narrowly missed him at a rally in Butler, Pennsylvania -- an extraordinary incident that Trump vowed Friday to commemorate with "a big and beautiful" new rally in the town, although he did not give a date. But Harris is enjoying a fast and remarkably smooth start after entering the race in the wake of Biden's abrupt withdrawal last Sunday, following weeks of falling poll numbers and mounting worry over his health.

For Harris, the Obamas' public declaration of support was a welcome push. The Democratic establishment's most revered power couple waited until all the other heavy hitters had come forward, finally making their move .