America faces an immediate future of military occupations, political executions and concentration camps unless millions of its citizens unite against “dictator” Donald Trump, a furious and frightened political analyst wrote Tuesday. Salon’s Chauncey DeVega delivered this impassioned rallying cry one day after the Supreme Court strengthened presidential immunity to cover political assassinations and use of the military against rivals, as dissenting justices and legal experts respectively warn. “The signals are flashing red that our fundamental system is in danger,” writes DeVega. “The elites wi…