They can’t allow it because their crimes will be exposed and they will go to prison or the gallows.
I fully expect a Kristallnacht before the election, with Trump and hundreds of conservative podcasters, broadcasters, politicians and activists murdered in a single night.
And I am not being hyperbolic.
As you said, they will not allow Trump to become President, by any means necessary.
That is the probable future. We can only hope to divert to a different timeline before then. I'm not optimistic.