North Carolina's Republican primary field to face Sen. Kay HaganKay HaganPolitics is purple in North Carolina Democrats can win North Carolina just like Jimmy Carter did in 1976 North Carolina will be a big battleground state in 2020 MORE (D-N.C.) got a little smaller after conservative radio host Bill Flynn (R) dropped his bid Thursday.

His decision may make it slightly easier for North Carolina House Speaker Thom TillisThomas (Thom) Roland TillisGOP and Dems bitterly divided by immigration Grassley offers DACA fix tied to tough enforcement measures We are running out of time to protect Dreamers MORE (R) to win the crowded GOP primary in the first round of voting. If no candidate wins 40 percent of the vote in North Carolina, a runoff is triggered, which could be costly for all candidates involved and hurt the GOP's chances in the race.

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Flynn cited fundraising struggles as his reason for dropping out.

"Though deeply appreciative of every gift and effort made on behalf of this campaign, I have failed to secure the depth of funding essential to continue in this primary race," he told the Charlotte Observer on Thursday afternoon. "Washington's deficit spending approach can be no part of a Senate campaign dedicated to conservative principles."

Though Flynn is out, a crowded primary field remains. Tillis is facing off against Tea Party favorite Greg Brannon (R), who has Sen. Rand Paul's (R-Ky.) endorsement; Minister Mark Harris (R), who has the backing of Arkansas Gov. Mike Huckabee (R); and Republicans Heather Grant, Ted Alexander and Edward Kryn.