It’s not the number of votes total! It’s the EC for specific states where the state is super-sensitive to certain counties.
The popular vote can be 100 million for Trump and 60 million for Clinton but if she wins 270 electoral votes, she is elected.
Each state has a number of electoral votes. Within each state there are counties that push the state voter totals over the top to win that state’s electoral votes.
In all honesty, if there is any disparity between the EC vote and the PV, it will be necessarily very small, relatively speaking, nothing like the spread that you mention. The winner of electors pretty much tracks the winner of the most votes in general, and the difference is going to be a percentage point difference if there is a disparity between the two counts.
So, If H wins the EC vote with Trump winning PV, it will be by a few hundred thousand at the most.
I do have hope that the several states which passed popular vote laws (awarding all of their electors to the PV winner) will stand by their laws. I think California is one of them, or had been working on it. Not to say that they won’t reneg when it goes against their politics.