How Hard is Flipping a Presidential Election, Part 2

My earlier post ran some numbers to show how many nullified votes would have been required to change the results of the 2016 U. S. presidential election. For comparison, I ran a similar evaluation of the 2012 election.  The overall election was not as close and individual states also tended to be less close.  I chose one combination of 10 states whose total Electoral College votes would have been enough to change the result; other combinations would also be feasible.  Here are the numbers:

Slightly fewer than 1.8 million nullified votes in these states would have been sufficient to change the results.  That is less than 2% of the total nationwide popular vote.  Changing the results of this election would have been more difficult than it would have been for the 2016 election. The effort would also require attacking considerably more states.  But the numbers still show that a small proportion of votes would have been sufficient to change the results.