Iran’s military retaliation, along with the political defiance of its new leaders, evokes a decades-old pattern of unrealized goals for American interventions in the region.

Ms. Stratton, a Democrat whose viral campaign ad featured voters’ profane views of Mr. Trump, said her campaign’s aggressive messaging was resonating.

The tech giant has been rebuilding its relationship with the Defense Department and is poised to benefit as it sidesteps competitors’ controversies.

A recent surge of A.I.-related imports has become an impediment to the smaller trade deficit President Trump wants.