Well, instead of speaking in generalities, as you have done, which is a clever trick, how about being specific?
When Congress refused to allocate funds to build a wall on the border, Trump simply said "OK, since Congress won't do as I demand, I will abuse the privilege of declaring a national emergency and scrape money from funds otherwise already dispersed." You see how that worked? It became a "national emergency" when a co-equal branch of government opposed Trump's plan. He had neither the support of the GOP Senate or House on this boondoggle during his first two years in office. But rather than press the issue, pissing off the very people who would make sure he stays in office, regardless of the findings of the Mueller report, Trump waited until after he was shellacked in the midterms to then press the issue with the Dems in the House. "Oh, the Dems are obstructionists! The Dems are for open borders!" All the while, the GOP in the Senate keep their dainty little hands from getting dirty.
Is that specific enough for you?
Are you suggesting a president of the United States could actually impose Martial Law and go around locking up political opponents by him/her self in today's world and get away with it?
He would not have to lock anyone up. He can simply declare a national emergency due to massive voter fraud (never mind there will be zero evidence to support the claim) and declare the results of the 2020 elections null and void.
Seems to me the president would have to have thousands of willing accomplices at the DOJ, in our courts and law enforcement agencies who have taken an oath to support and defend our Constitution.
You ignore that Trump has a base of approximately 30% of the population who support him regardless of the facts, like the fact that Trump lies on a daily basis, about big things and little. Any law enforcement officer, any DOJ employee, any court employee who would dare to speak out against Trump would be declared a traitor and likely fired or maybe even arrested.
Tell me, do you think the American People would stand idle and do nothing? Do you remember the Bundy standoff?
Yes, I remember the Bundy standoff very well. What I found most interesting about that incident was how one particular demographic did not show up to support Bundy, namely Bundy's fellow ranchers. He got a bunch of anti-government bikers to draw down on federal agents, apparently willing kill them to allow Bundy to freeload off taxpayer's land, while other ranchers paid their legal grazing fees and never made a peep in support of their neighbor. Why do you suppose that is?
I'm really not sure what you mean by wiping his ass with the Constitution.
Trump bypassed Congress to obtain funding when the people's representative said no. He did it by abusing a presidential responsibility (national emergency). Trump has ordered numerous people in his administration to ignore Congressional subpoenas. He has repeatedly attacked the integrity of the courts when he disagreed with their rulings. All this, and the people have stood by and done nothing.
Do you really think the American people with the support of LEOs are going to rise up in armed revolution to oppose Trump if he ignores the USSC and puts the citizenship question on the census? Ignoring the USSC is in my opinion is "wiping his ass with the Constitution" and I believe as things are, there is nothing that can or will be done about it. And, as I said, if he declares the 2020 election results null and void, there is nothing anyone can do about it. He has an AG, who, despite his oath to "support, protect, and defend the Constitution" will never hold Trump accountable for anything. If the Director of the FBI were to even raise an eyebrow, Trump would fire him immediately. And right now, he has enough spineless GOP senators who fear being primaried to survive any impeachment trial.
No, Trump has all the power he needs to do whatever he wants whenever he wants.