And what about the Governors actually running for re-election?

Many of them would be voted out the next time they ran.

.. there won't be any more elections.. he'll appoint governors of the states that are loyal to him

Obama would have been the last president of the U.S.

Only the states that hold elections can designate electors, so cancelling the election in red states would guarantee a landslide victory for Biden.

The precedent is in the elections of 1864, during the civil war, when confederate states did not get to vote.

The Constitution does not require states to assign their electors on the basis of the statewide vote. It does not even require a statewide vote. Rather, it explains that each state “shall appoint” its electors “in such manner as the Legislature thereof may direct.” In other words, each state legislature gets to decide how electors are appointed—and, by extension, who gets the vote.

Today, every state legislature has delegated this task to the people. But at first, state legislatures just did it themselves. In the first presidential election, for instance, the legislatures of Connecticut, Delaware, Georgia, New Jersey, and South Carolina appointed electors directly. Eventually, every state moved toward the modern system. But the Supreme Court confirmed in 1892’s McPherson v. Blacker that states were free to revert to the old method, and in 2000’s Bush v. Gore, the court reiterated this point. The majority declared that the state legislature “may, if it so chooses, select the electors itself,” and retains authority to “take back the power to appoint electors” even after switching to a statewide vote.

Put simply, it is perfectly constitutional for a state legislature to scrap statewide elections for president and appoint electors itself. It would also be constitutional for a state legislature to disregard the winner of the statewide vote and assign electors to the loser. And because the Constitution grants legislatures the authority to pick electors this way, Congress cannot stop them.

https://slate.com/news-and-politics/2020/03/trump-cancel-election-day-constitution-state-electors-coronavirus.html

They can chose however they want to name the electors, but once they do, they cannot change the rules without legislative action.

count up how many states the GOPoo controls governor and legislatures.

Now it's the governor cancels the election and choses the electors.

In states that Trump would've won anyway.

The point is there will be an election on the appointed date, one way or another.

Besides, even if it were true, the red states alone do not hold enough electorates to reach 270

There are red States with Democratic Governors and blue states with Republican Governors. If all of them do this according to Party lines, how does the math work out?

For example, if Florida's Republican Governor cancels Florida's election, that removes Florida's electoral votes from the equation, and Trump needs those electoral votes to win. Likewise with Ohio. If all the red States remove their electoral votes from the total, how can Trump win? I don't get it.

would not be able to give their already unfairly skewed 3 electoral votes.

The Repuke state legislature at the time said it did not have the time or money to set up an election in 1876. so they just appointed electors to vote for Hayes over Tilden.