Democrats are trying to chip away at Republican control in state Capitols during elections for governor and state legislature.
Tuesday’s elections feature contests for 36 governors’ offices, including headliner races in Florida and Georgia.
In both Deep South states, black candidates would break barriers if they win but face Republicans who are drawing energy from their close alignment with President Donald Trump.
Republicans currently control two-thirds of all legislative chambers and the governor’s office in 33 states. That includes 25 states where they hold a trifecta of power, compared with just eight for Democrats.
National Republican and Democratic groups have poured record amounts of money into this year’s state elections.