I just don’t know how Donald John Trump’s stonewalling Congress is going end well for the president of the United States.

He is digging in on all fronts. No witnesses should testify before congressional committees; no documents are forthcoming; he wants to stop the special counsel, Robert Mueller, from testifying before Congress.

How does any or all of it not constitute an obstruction of justice?

The battle is coming. House Judiciary Committee Chairman Jerrold Nadler plans to file contempt of Congress complaints against Attorney General William Barr. Where it goes, of course, is anyone’s guess.

Unlike many previous presidents, this one seems resistant to “compartmentalizing” these relationships. He flies into rages at any challenge of the legitimacy of his election in 2016. He takes quite personally any criticism of any sort, from any source.

He has declared all-out war against Congress. He doesn’t understand, let alone appreciate, that the legislative branch of government has just as much power as the executive branch.

The collusion issue is a goner. Obstruction of justice remains in play.

Congress is seeking to assert its role in governmental oversight. One would think its Republican members — who comprise most of the Senate and a healthy minority of the House — would be willing to stand up for the legislative branch’s role. They aren’t. They are rolling over for the president.

Again, I must ask: How in the name of good government does this end well for the president?