Ohio's $467 million U.S. Senate race is now the most expensive non-presidential contest on record, according to AdImpact.

Incumbent U.S. Democrat Sherrod Brown has been serving Ohioans since 2007.This year, he's being challenged by Republican Bernie Moreno, a businessman and owner

The biggest race on Ohio's Nov. 5 ballot is that between Sen. Sherrod Brown and businessman Bernie Moreno. Here's what you need to know about the candidates and issues. Brown, a Democrat, was first elected to the U.S. Senate in 2006 after defeating then-Sen. Mike DeWine.