Yes. A president can fail to qualify if none of them receive 270 electoral votes. Not the case in this election.
2) whether or not the Vice President qualifies is independent of whether the President qualifies, since one can qualify without the other.
Highly unlikely but theoretically true. If one or more faithless electors switched their vote for president but not vice-president then it may be possible to have the vice-president qualify but not the president.
“
1)the 20th Amendment says that a President elect can fail to qualify.
Yes. A president can fail to qualify if none of them receive 270 electoral votes. “
Reading is not your strong suit, is it?
“President elect” means AFTER the EC vote, duh duh.