(KTEN) — Oklahoma Rep. Markwayne Mullin (R-District 2) is getting a new office and a new title on Capitol Hill.

Mullin coasted to election victory on Tuesday in his bid to assume the U.S. Senate seat being vacated by fellow Republican Jim Inhofe. Mullin will become the first Native American to serve in the U.S. Senate in nearly 20 years.  

A citizen of the Cherokee Nation, Mullin defeated former Democratic Rep. Kendra Horn.

The last Native American who served in the Senate was Ben Nighthorse Campbell of Colorado, who left office in 2005.