Updated 10:58 p.m. ET, 6/3/2014
Jackson, Mississippi (CNN) - It's unclear how Tuesday's GOP Senate race in Mississippi will end, but the race has no doubt been close–and ugly–in the final stretch.
With 87% of the state's precincts reporting as of 11 p.m. ET, state Sen. Chris McDaniel was narrowly ahead of incumbent Sen. Thad Cochran, 49.9% to 48.4%, according to numbers compiled by The Associated Press.
In Iowa, CNN projects state Sen. Joni Ernst, who garnered support from Mitt Romney and Sarah Palin, will win the GOP primary for the U.S. Senate seat.
Tuesday is the biggest single day of primary voting this year, with eight states holding contests from coast to coast. But the two races that are grabbing the most attention are the contests in Mississippi and Iowa.