Republican car dealer and blockchain entrepreneur Bernie Moreno defeated Senate Banking Chairman Sherrod Brown in Ohio, ousting the Democratic party’s most prominent populist and putting the GOP on course toward a Senate majority.

After enduring nearly half a billion dollars’ worth of mostly negative ads for months, Ohio voters are set to decide one of the nation's most-watched Senate races.

COLUMBUS, Ohio (AP) — Three-term Democratic U.S. Sen. Sherrod Brown of Ohio faces perhaps the toughest reelection challenge of his career Tuesday in the most expensive Senate race of the year as control of the chamber hangs in the balance.