By Brad Reed Former Rep. Mark Sanford (R-SC) warned during a CNN interview on Tuesday that he doesn’t see bright prospects for the future of the GOP if it continues to serve as a “cult” for former President Donald Trump. While talking about upcoming primary elections in his home state, where Reps. Tom Rice (R-SC) and Nancy Mace (R-SC) are both facing Trump-backed challengers, Sanford said that the GOP needs to get back to being about issues and policy rather than simply a vehicle for Trump’s grievances. “It is on a path to political extinction if we stay on the road that we’re on,” he said. “T…