Regardless of the election results, the presidency of Donald Trump will be over by the spring of 2021 if the Democrats win the United States Senate.
Trump was impeached for soliciting aid from Ukraine to debase Joe Biden. He was saved by a Republican-dominated Senate. He would stand no such fortune in the hands of a Senate controlled by Democrats.
Assuming Trump remains in office either by winning the election or by way of a complicit Attorney General William Barr, he will be subject to continuing claims of violating his oath of office.
An active House might simply impeach him for violating the emolument clause of the Constitution. On July 25 of this year, a US District Court judge permitted a suit to continue claiming such a violation. Another threat is the New York District Attorney pursuing Trump for possible banking fraud.
It is questionable that Trump and his inner circle are not aware of the danger confronting him win or lose. Trump has, for four years, played to his base that at times seems cultish.
Why Trump never sought to widen his base of support to protect him from the pending catastrophes he and his family are exposed to will remain a question that will cause debate by historians for years to come.