After the South Carolina presidential primary at the end of the month, Democratic investment in the state usually dries up.

But former state party chairman Jaime Harrison, who’s giving Republican Sen. Lindsey Graham his toughest challenge yet, is trying to change that this year by getting national organizations to invest in voter registration efforts to help reach some of the 400,000 South Carolinians of color who are eligible to vote but not registered.

With the backing of the Democratic Senatorial Campaign Committee, Harrison is taking on a three-term incumbent in a state that hasn’t elected a Democrat statewide since 2006. Graham, who started out as a critic of President Donald Trump, has now become one of his biggest allies. That would seem to go over well in a state that Trump carried by 300,000 votes, or 14 points, in 2016.

Harrison is tired of hearing that.

“You can’t win if you can’t compete,” he told CQ Roll Call last week. “Republicans understand that. You look at states like Massachusetts, Maryland, Vermont. What do they have in common?… Blue states, Republican governors!”