Well that would be the case in this example, so in absence of a legitimate vote count, I don't see how the EC could do anything at all but sit on their hands. So you are technically incorrect on that one. You are correct however that the sitting president would be required to vacate the office, Piezoe's reference points that out too. We would get an "acting" president. In 2020 it surely wouldn't be DJT.That's because the passage he cherry-picked (and left out most of for context purposes) describes what happens AFTER The Electoral College AND The House have decided that there is not a President-Elect nor Vice President-Elect.