by Jeff Crouere, Ringside Politics, ©2023 Photo: Gage Skimore, Wikimedia Commons, CC BY-SA 3.0 (Apr. 30, 2023) — The worst nightmare for an incumbent President is to receive a serious intra-party nomination challenge. In recent history, it has happened three times. In 1976, a conservative challenger, former California Governor Ronald Reagan, made a valiant attempt […]