"Joe Biden — a frail, incumbent president who struggles to get through a one hour news conference without misspeaking the name of a world leader or his own vice president — was fighting in the polls beside Trump, a convicted felon . . ."

That isn't accurate about Biden; he did just fine at the press conference, no more than the usual slips that have been in his public speaking over the past 50 years or so.

We don't know what would have happened if the shooter had succeeded, but while the suggestion that US democracy is under pressure is reasonable, the general characterisation of that piece is a dystopian rant.