Former Republican presidential candidate Mike Huckabee announced Thursday he's endorsing Charlotte pastor Mark Harris in the GOP primary for North Carolina Senate.

Harris, along with four other North Carolina Republicans, is battling in a hotly contested GOP primary to take on incumbent Sen. Kay Hagan, D-N.C.

“I am very excited to endorse Mark Harris for U.S. Senate because he’s a true conservative who will join us in fighting against the status quo in Washington, D.C.,” Huckabee said in a statement.

Huckabee's endorsement comes just two days after a Public Policy Polling poll showed presumptive frontrunner Thom Tillis pulling away from the crowded field. The poll had Tillis leading Harris by 11 points.

“Americans are looking for leaders who they can trust to place their oath of office above partisan politics by fighting for the Constitution and standing up for what they believe in. Mark is the right choice for conservatives and Republicans in North Carolina," Huckabee said.

Hagan's job approval has slipped in recent months to 39 percent among North Carolina residents as she has continued to suffer from the botched rollout of the Affordable Care Act. In North Carolina, 61 percent of residents say the Obamacare implementation has been unsuccessful, according to recent polls.

President Obama visited Raleigh, N.C., on Wednesday to discuss the importance of manufacturing jobs. Hagan did not accompany the president on his trip.