Even before Team Trump moved seriously to shut down the opposition altogether, I have seriously wondered whether it will ever be possible for a Democrat to be President again.
Last time a Democrat won, Trump tried every trick he could think of to overturn the outcome. He sued. He pressured Republican election officials to throw out the results. He pressured Republican state legislatures to appoint alternate sets of electors. He suggested having the military, or Homeland Security, seize ballot boxes and do a "recount." He asked the Department of Justice to declare fraud. He persuaded many Republican members of Congress to vote against certification, but Democrats had the majority in the House. So he pressured his Vice President to unilaterally reject the electors from states he lost. And when all that failed, he incited a mob to march on the Capitol.
He was thwarted by heroic Republicans like Brad Raffensperger and Rusty Bowers, who insisted that election results must be respected, and by members of the "deep state" who insisted on following the law. Does anyone believe Republican election officials will stand up to Trump this time? And, even if they do, he now controls the Deep State, and can order it to do anything, up to and including a military coup, to keep him in power.
To my mind, the chances of a Democrat ever being President again will depend on two separate and seemingly unrelated, but actually closely related factors -- Trump's health and the health of the economy.
Assuming Donald Trump does not shut down the Democratic Party altogether and allows it to run a candidate in 2028, it seems a safe assumption that he will be the Republican candidate if his health allows. Trump has not let himself be bound by any other laws, so why should he respect the 22nd Amendment? And if he runs and loses, there is no way that Donald Trump would not overturn the result.
It also seems a safe assumption that if Trump dies or becomes completely incapacitated between now and 2028, he will not be the candidate. But what if he is not dead or comatose or barely verbal, just wholly incoherent. (As in significantly less coherent than he is now). My guess is that if the economy is doing reasonably well, this will be unmentionable and he will still be the candidate. But if the economy is in serious trouble, my guess is that at some point people will start to notice that Trump is unfit for a third term and get him disqualified.
Again, assuming the Democratic Party has not been shut down and an actual contested election takes place, would a Republican not named Trump accept the results? I will concede that up till now, Republicans not named Trump running for an office other than President who have lost have accepted the results. Even if they lost by only a few hundred votes, and the shift came in late counting days after the election, Republicans have accepted defeat. I accept the same to happen in this November's election. I am skeptical that Republicans will accept defeat, at least at the federal level, in 2026, assuming a contested election at all. But we will see.
But, assuming a genuine contested election in 2028 with a candidate other than Donald Trump, there will be the 2020 precedent that elections for President are only binding if the Republican wins. What would persuade a Republican other than Trump to allow a Democrat to take power?
My guess is, only if the economy is such a mess that they decide it is better to step aside and let the Dem take the blame.
I guess we will see.