A former C.O.O. of the Carolina Hurricanes - who was also the U.S. Ambassador to Denmark - has joined the list of Republicans who are considering challenging Democrat Kay Hagan for her U.S. Senate seat. Jim Cain said friends and family have encouraged him to run.  State Senate President Phil Berger, State House Speaker Thom Tillis, and U.S. Representatives Virginia Foxx and Renee Ellmers are also reportedly eyeing the seat.