(Find highlights and analysis here.)

Voters cemented the front-runner statuses of Donald J. Trump and Hillary Clinton by handing them sweeping victories on Super Tuesday, the largest voting day of primaries and caucuses for both parties.

Here’s what happened:

• Donald J. Trump rolled over his Republican rivals by winning seven states. He took Virginia, a bellwether state that had been coveted by Senator Marco Rubio. He expanded his reach with evangelicals in the South with victories in Georgia, Arkansas, Alabama and Tennessee. He also won in Massachusetts, where his message resonated with many working-class voters, and in Vermont.

• But Senator Ted Cruz held off Mr. Trump to win Texas, his home state. A loss for Mr. Cruz here would’ve been a devastating blow to his presidential ambitions. Mr. Cruz saw his second victory of the night in Oklahoma, and his third in Alaska.

• Late in the voting, Mr. Rubio scored his first victory, winning the Republican primary in Minnesota. He urged Republicans not to give up hope of thwarting Mr. Trump.“I will campaign as long as it takes,” he said in Miami.