RALEIGH, N.C. -- Incumbent U.S. Sen. Richard Burr has held off a challenge from Democrat Deborah Ross to retain his seat.

Burr repeatedly attacked Ross for her work as the former top attorney and lobbyist for the state American Civil Liberties Union in his bid for a third term.

Throughout her campaign, Ross tied the Republican senator to Donald Trump and to state GOP policies such as the law limiting protections for LGBT people.

Tuesday's race was considered critical for Democrats trying to regain control of the Senate. Ross was initially not well-known outside Raleigh, but outside money poured in as national Democrats increasingly saw Burr as vulnerable.