Jenner is a Republican and, I believe, supported GEOTUS. From commiepedia:

Jenner is a Christian, leans towards political conservatism, and is a Republican.[208][209] "I have gotten more flak for being a conservative Republican than I have for being trans," she has said.[210] Although stopping short of an endorsement, Jenner said she liked Ted Cruz in the 2016 Republican presidential primaries, despite Cruz's negative views of trans people.[211] On her reality show I Am Cait, Jenner said that although she does not support Donald Trump, she thinks he would be good for women's issues; she then stated she would never support Hillary Clinton.[212] She ended up voting for Trump in the 2016 presidential election.[213]