It's existential at this point. Does she do anything else with her time? It's like her sole mission in life now is to STOP TRUMP.
When stupid things are said always reach for the most hyperbolic explanations first. It makes for good political theater. Technically Trump said nothing about Liz Cheney facing a firing squad for treason. He was talking about her being a war hawk, an armchair warrior who would not hesitate to put our boys into harm's way. She's out of office now anyway. The best thing that could happen to Trump right now is a good case of laryngitis. Her rhetoric is no better saying this is how dictators destroy free nations. There could be any number of nutjobs out there right now who could take her words quite literally. Maybe that's what some on the Left want. She could've just called him a dumbass and left it at that. Incidentally in the eyes of the Left when did the Cheneys become less than evil? Dick Cheney's Halliburton and missing WMD days is more like an original Batman episode, dated but watchable but now the Left has moved on.
We're in the home stretch. If Trump loses Liz Cheney will have accomplished her mission and hopefully find another purpose in life. If he wins it will be another four more long and agonizing years for her and the Left. Pop a Prozac.