An overview of what's at stake in the 2022 race to represent Pennsylvania in the U.S. Senate, as well as candidate profiles on Democrats John Fetterman, Alexandra Khalil, Conor Lamb and Malcolm Kenyatta; and Republicans Kathy Barnette, Jeff Bartos, George Bochetto, Sean Gale, David McCormick, Mehmet Oz, and Carla Sands.