He is about 40 short so its not impossible. What kind of people get selected for the Electoral College and how strong and/or well off are they. Could Trump's last hope could be to buy the 40 he is missing for a second period as president.
Now that his core voters where to slow to embbrase his strategy of encouraging voter fraud in the hope enough of them would come forward and cast doubt on the election, emember its a secret vote so you couldn't prove who the fraudulent voters supported, he does seem desperate for any other way of changing the electrion result. Not even swaying from casting doubt over the whole election system if it can gain him the most narcisdistic president USA so far have seen. Have you ever seen any politician in a supposedly democracy that demands so total outspoken admiration of they who surround him at press conferences.
Trouble is the Americans have never been in a situation like this where the sitting president is very wealthy and unscupoulus and have so manny very rich backers from so many also lugubrious sources. Not that he needs them. Haven't his grasroot supporters collected in enough of a fund to pay both 1 or 2 million to each that was supposed to vote Biden but swithces on the day. Not that he needed even that extra money to do it, but he seems to gready to use any of his own if he can avoid it.
Throw in a quick pardon in the deal and many could be persuaded. Plus a pardon for they who persuade them. In all this pardoning thing is a tool with far reaching consequences few could have foreseen. And any impeachement proceedings of Trump himself as a result could easily be held up by the even now 50 Republican Senators plus Pence's double, vote until the 4 years are gone.