Should your dream and paranoia come to fruition, that Trump loses the election and then refuses to vacate the WH, respectively, that would be a law enforcement issue and of no concern of the armed services.
It's Constitutional law enforcement issue.
Article VI - Debts, Supremacy, Oaths, Religious Tests
This Constitution, and the Laws of the United States which shall be made in Pursuance thereof; and all Treaties made, or which shall be made, under the Authority of the United States, shall be the supreme Law of the Land; and the Judges in every State shall be bound thereby, any Thing in the Constitution or Laws of any State to the Contrary notwithstanding.
The Senators and Representatives before mentioned, and the Members of the several State Legislatures, and all executive and judicial Officers, both of the United States and of the several States, shall be bound by Oath or Affirmation, to support this Constitution; but no religious Test shall ever be required as a Qualification to any Office or public Trust under the United States.
And it's not mindless paranoia. People in his own family don't put it past him to pull such a stunt. In fact his Russian handlers at Wikileaks had emailed Don Jr the day of the election in 2016 as polls were opening across the country pitching to him that if his father loses the election they believe that it would be very interesting if his father were to challenge the results. And Trump had been setting up to do just that by repeatedly claimed process was rigged and if he loses it would be because it was rigged. Bur strangely not a word fixing so called 'rigged system' since he was elected. Now if his refusal to step down inspires his half-cocked supporters to rush to defend his and violence and bloodshed ensues you can bet your sweet bippy that the military can and will likely will be called upon to enforce constitutional law and restore order. Now I don't expect things to get that far because when you get right down to it Cadet Bone Spurs is a sniveling coward, and I'm sure it would wind up with him coming out with his head bowed and his tail between his legs.
And if there is electoral fraud, or that famous word 'inconsistencies' in a particular states voting, the damage is contained to that state. Without the EC, its a nationwide problem. Should Trump pick up an extra 500,000 votes in CA, it probably won't be enough to sway that state's electoral vote. But if there is a problem with the vote in Pennsylvania... It all gets recounted nationwide.
First of there has never been any problem whatsoever with voter fraud in any election in this country. But strategic mischief, corruption and interference has been a problem. From poll taxes, Jim Crow laws, gerrymandering, voting rights suppression, vote suppression via intimidation, the closing of polling stations in districts deemed not be favorable to your party, the purging of voter rolls, disinformation and foreign interference. The EC is a system encourages these types of malpractice and malfeasance, and it's one that relegates the vast majority of states to spectator roles in national election resulting in lower voter turnout and increased political polarization.
Did the Russian interference campaign swing the election in favor of Trump by changing the minds of enough voters? It's impossible to fully know one way or the other. It can't be proved, and nor can it be disproved. But it however well within the range of being wholly probable. The 2016 Election turned entirely on the outcome of the vote in just 3 states. Pennsylvania, Michigan and Wisconsin. The
total differential of votes in those 3 states between the winner and loser came down to
less than 80,000 votes. So just 80,000 votes, split among 3 states, of the nearly 63 million popular votes cast in 2016 determined the outcome of our election. That's just 0.00126 percent of all the votes. A minuscule amount. And the 'loser' had 3 million more popular votes than the 'winner'. The losing candidate having a substantial number of more popular votes than the winning candidate has happened at least 5 times in our nation's history. And in 2 of the last 4 national elections. It's time this relic of the past and American slavery to be retired as it is no longer reflective of the will of the people.