Roy Moore, a former State Supreme Court chief justice, defeated Senator Luther Strange on Tuesday in the Republican runoff to fill the United States Senate seat vacated by Jeff Sessions, now the attorney general. Mr. Moore will face the Democratic nominee, Doug Jones, a former United States attorney, in the general election on Dec. 12.

Northern Alabama was anticipated to be a pivotal region, with Mr. Strange and Mr. Moore facing off. The area was a stronghold of Representative Mo Brooks, who came in third in the primary. Mr. Strange targeted Mr. Brooks’s home base of Huntsville, and President Trump campaigned for him there last week.

Over all, the race was expected to hinge on turnout of Mr. Moore’s rural base and Mr. Strange’s supporters around Birmingham and Mobile. To offset his rival’s dedicated backers, Mr. Strange counted on a larger number of voters — beyond those who participated in the primary. Read more »