Democratic challenger Paul Davis has conceded the Kansas governor’s race to Republican incumbent Sam Brownback.

Brownback built a small lead in Tuesday’s election with most of the vote counted. The Associated Press has not declared a winner in the race.

The governor successfully pushed the GOP-dominated Legislature during his first term to slash personal income taxes to boost the state’s economy. The state cut its top rate by 26 percent and exempted the owners of 191,000 businesses from income taxes altogether.

Davis told supporters at a rally in his hometown in Lawrence that the state faces real challenges and people must work together. He said, “While we fell just short of the outcome that we wanted, I would do it all over again in a second.”