Democrats will keep control of the U.S. Senate after Nevada Sen. Catherine Cortez Masto — once considered the most vulnerable Democratic senator in the midterms — fended off a challenge from Republican Adam Laxalt after days of vote counting. The nation’s first Latina senator, Cortez Masto was targeted by national Republicans as their best chance to flip a seat. And because Democrats only control the 50-50 Senate because of Vice President Kamala Harris’ tie-breaking votes, Republicans only needed a net gain of one seat to take the chamber. But with her seat secured, Democrats are guaranteed control no matter the outcome of a Dec. 6 runoff in Georgia between incumbent Democratic Sen. Raphael Warnock and Republican challenger Herschel Walker.