The last time we had an event of this prominence was probably the attempt on Reagan's life, which I was around for after college.
There's no fucking why they're going be able to memory hole this, I mean, it was on freaking live TV, and any blatant attempts by the totalitarian tech Left will likely not end well. People on the Right, Center, and center Left will not be happy about such, there's just too many people to try to tamp down, say about two thirds of the US.
Oh, yeah, Muck is not pleased, owns Xwitter, and is already saying the right things, including full support for Trump.
Really, the only thing that _might_ work is an early Plan C for coup, and I don't think that would work well. These sorts of things need a moral calculus that just isn't there tonight.