Single Way That The Electoral College May Fail

 My scenario.

You get to the day after the election...realizing that five states have not completed their count, and indications are....they are seriously in some delay pattern. The states?  Penn, AZ, Michigan, Georgia, and Wisconsin.

A week later....strong indicators are that fake ballots are falling into play.

Then 15 states go and do the 'damnest' thing...they refuse to certify their election results.  The EC meets on schedule, but there's not enough votes to carry it it's purpose.

So we go to January, and the alternate method....a state by state vote for President and VP.

VP in the Senate is easy and Vance easily wins.

House vote on President.....various tricks are being used by at least twenty states....to stall the vote.  

Inauguration day comes....the House Speaker says he'll push on to have Vance take the oath, and he (the House Speaker) will take the VP oath.

Immediately after Vance is sworn in....the entire top level of the Justice Department and FBI are laid-off.  Vance then suspends federal funding to the states in the delay tactics.  

The opposing states now say a form of civil war has started up....but they also admit that they are financially in a bind....with fed funding dried-up.

A month passes, and the states wise up....Vance won't budge.  Trump arrives and is given the oath.  The crisis ends.

Note, the FBI in it's present form....never comes back after this incident.  Half of the manpower is permanently removed.