Elissa Slotkin is neither a congresswoman nor a senator-elect any longer, having been sworn in as Michigan's newest U.S. senator Friday afternoon with the installation of the 119th Congress. Across the Capitol,

Wyo., was officially sworn into the U.S. Senate to continue serving Wyoming in the 119th Congress. He also began his new

The affable traditional conservative from South Dakota is the first new chief of the Senate G.O.P. in nearly two decades. He will confront a challenge managing President-elect Donald J. Trump’s expectations.

Americans know very little about the new Senate Majority Leader John Thune (R-S.D.) as he prepares to lead the Senate that will operate under a Republican majority, according to a survey that was