Why would Trump fire anyone? Voters have signaled that they no longer care how classified information is handled. Maybe they no longer know why classified information should be carefully guarded, or it's just not a priority anymore. We all remember the FBI's photos of top secret documents being stashed in the Mar a Lago bathroom and ballroom. Not only did Trump not face any consequences for that whatsoever, he actually gained votes compared to the last time he ran. Trump is behaving completely rationally here. He's not going to lose even 1% of his support base over this, so why would he take any action? It's pretty interesting that for all the decades of skepticism and distrust of the government I've heard coming from conservatives (2A to guard against tyranny, "government is the problem", etc), they're putting an awful lot of blind trust in this particular administration.
I think the setup is different than what could be explained by assuming “blind trust” is being placed in the Trump administration. Individual Republican lawmakers in Congress who might otherwise try to stop Trump by proposing legislation or objecting to his Senate candidates face the prospect of a well-financed primary challenge the next time they are up for election. Unless and until Republican lawmakers find a way to get together to oppose the administration in large numbers, most lawmakers will avoid doing so for fear of being “primaried.” Those who are indeed bold enough to act on their own are pushed out by the asymmetric opponent.
And for the individual lawmaker who tries to work with their colleagues to mount a primary-proof challenge to the administration, there is always the risk of being outed at any point in the process of organizing. Once outed, the more powerful adversary picks off the opponents one by one, with the others retreating back into darkness to avoid the same fate.
