Oklahoma voters made their final changes Tuesday to the Republican-controlled state Senate, which has undergone a series of dramatic shifts this year thanks to elections and term limits. Twelve seats were decided by voters in the general election.

Tuesday’s election swept in several new House and Senate members vying for open seats, but also proved to be a good night for incumbents. Not a single incumbent state House or Senate lawmaker lost Tuesday.

Republicans on Saturday were close to clinching control of the U.S. House of Representatives, a critical element for President-elect Donald Trump to advance his agenda when he returns to the White House in January.

House control is still up for grabs with more than two dozen races left to be called. Republicans are looking to grow their Senate majority with seats still undecided in Nevada and Arizona.