• In the southern U.S. state of Alabama, Democrats celebrated an unlikely victory in an election to fill a crucial Senate seat. (Here are detailed results.)

The race captivated the nation not only for its debates over party loyalty and morality, but also for its immense implications for both parties: The upset trims the Republican majority in the Senate to one. It is a snub of President Trump, who backed Roy Moore, the Republican candidate, above, despite accusations of sexual misconduct with teenage girls.

Earlier in the day Mr. Trump lashed out at his own accusers as fabricators and insulted a female senator as someone who “would do anything” for campaign contributions.