The top strategist for the embattled super PAC backing Florida Gov. Ron DeSantis ' campaign for the White House resigned Saturday night in the latest sign of trouble for the GOP hopeful less than one month before voting begins with Iowa’s kickoff caucuses. Jeff Roe, the top adviser to Never Back Down, is the latest senior staffer to exit Never Back Down, which has been the largest outside group supporting DeSantis’ candidacy. The Associated Press reported earlier this week on growing concern among some within DeSantis’ operation that interactions between his campaign and his network of outside groups were blurring...