DAVID MARCUS: De facto President Trump's handling of shutdown threat was a masterclass

Donald Trump will not be president of the United States for another month, at least not literally. Yet, his recent victory in the battle of the budget shows that, for all intents and purposes, he is already the nation’s leader, and not a moment too soon.

In the space of just a few days, Trump’s pressure on the Congress, including siccing his Department of Government Efficiency (DOGE) attack dogs Elon Musk and Vivek Ramaswamy on reckless spending, turned a 1,500 page monstrosity of a bill...