Republican Roy Moore, the controversial former Alabama Chief Justice known around the country as the "10 Commandments Judge, faces Democrat Doug Jones in the Dec. 12 election.
Moore's most recent campaign has been mired in controversy.
Here's what you need to know about the Alabama Senate GOP nominee:
Kickboxer, cowboy, judge
The victory is the latest chapter in Moore's career, which began after he graduated the University of Alabama School of Law and returned to his hometown of Gadsden as an attorney. He made several unsuccessful political attempts - as well as spending time as a kickboxer and cowboy in the Australian Outback - before being appointed and later winning election to the circuit judgeship in Etowah County, Alabama. His election marked the first time a Republican had won a county-wide race since Reconstruction.
10 Commandments
After assuming the circuit judge bench, Moore had hung a homemade Ten Commandments plaque on the wall of his courtroom. Defendants in his court later complained about the religious display, as well as Moore's practice of beginning the sessions with prayer. The ACLU sued Moore, who remained defiant against later court orders to remove the plaque.
After gaining national attention for his stand on the 10 Commandments, Moore was urged to run for Chief Justice of the state Supreme Court, going on to defeat Associate Justice Harold See in the GOP primary and Democratic challenger Sharon Yates in the general election. He was sworn in on Jan. 15, 2001.
After taking office, Moore installed a 5,280-pound granite block that featured Constitutional quotes and two large tablets with the 10 Commandments outside the state Judicial Building. The move prompted a lawsuit from the ACLU and the Southern Poverty Law Center, among other groups, which Moore dismissed saying the 10 Commandments were the "moral foundation of U.S. law" and therefore appropriate in a judicial setting.
Court rulings later ordered Moore to remove the monument, though he remained defiant. Alabama's Supreme Court voted to overrule Moore's decision to disobey the court order and a complaint against him was filed with the Alabama Court of Judiciary. The COJ issued a unanimous ruling that Moore had violated the Canons of Judicial Ethics by defying the ruling and ordered the Chief Justice be removed from office in November 2003. The decision was upheld through several appeals.
Moore sought the Republican nomination for Alabama governor in 2006 but lost to eventual winner Bob Riley. He ran for governor again in 2010, but placed fourth in the GOP primary.
Return to the Chief Justice post
His next bid - this time to return as Chief Justice in 2013 - was successful. Moore was again elected in 2013 but served only three years before being suspended again, this time for directing probate judges to continue to enforce the state's ban on same-sex marriage despite a U.S. Supreme Court ruling. Moore appealed his removal but then opted to resign and announced he was running for the Senate to replace Jeff Sessions, who had been named U.S. Attorney General.
Senate run
Moore and former Alabama Attorney General Luther Strange - who had been appointed to complete Sessions' term - won the GOP primary before Moore's September win.
Allegations
In November, the Washington Post reported Moore had allegedly had sexual contact with a teenage girl in the 1970s when he was in his 30s. After the initial report, other women said Moore pursued them as teens while one, Beverly Young Nelson, said she was assaulted when she was 16.
Moore denied the charges but the allegations rocked the race and placed his candidacy in jeopardy. Alabama Republicans backed Moore, however, and eventually, President Trump issued his endorsement.
Roy Moore at a glance
Roy Stewart Moore
Hometown: Gadsden, Alabama
Education: United States Military Academy
University of Alabama School of Law
Wife: Kayla Kisor
Family: Four children and five grandchildren.
The Moores are members of First Baptist Church in Gallant, Alabama.