In the third week of the joint US-Israeli war against Iran, Donald Trump faces decisions that could define the rest of his presidency.

But if the American commander-in-chief is grappling with a war of choice that seems in danger of spiralling in ways he can't control, those concerns are not playing out in public.

In more than an hour of public remarks at the White House on Monday, he discussed his thinking on the state of the war effort - and also on Kennedy Center renovations, White House ballroom construction plans, this year's World Cup tournament, the health of a Republican congressman and a host of other unrelated topics.

It was classic Trump, as unscripted and wide-ranging as ever. This past weekend, he played golf at his Florida resort. And on his Truth Social website, he devoted nearly as much time to railing about the Supreme Court as he did to discussing the Iran War.

While Trump may be interested in other topics, he is confronting a lesson previous American presidents have learned the hard way - that war can consume a presidency whether they want it to or not.

And evidence continues to mount that a war that Trump had previously said was 'already won' and 'very complete' now has a timeline that could stretch for weeks or even longer.

On Monday afternoon, Trump announced that the US had requested that a planned presidential trip to China in early April be delayed for a month because of the war.

The president's utmost responsibility right now as commander in chief is to ensure the continued success of Operation Epic Fury, White House Press Secretary Karoline Leavitt said.

Over the weekend, the president posted on social media that he was forming a coalition of forces to help protect shipping through the Strait of Hormuz, which has been threatened by Iranian attacks.

However, a growing list of nations, including Japan, Australia, and many European powers, have indicated that they are not interested in joining the effort.

UK Prime Minister Keir Starmer emphasized that they would "not be drawn into the wider war."

This sentiment puts Trump in a precarious position regarding whether to commit the US Navy to secure a vital passage for the world's oil supply.

The military and political landscape remains uncertain as Trump's tactics may inadvertently endanger US forces while potentially inflating domestic oil prices, further complicating his political standing.

In addition to the complexities of military engagements, the growing strain on energy prices presents a formidable challenge to the administration as economic concerns drive public sentiment.

A recent increase in the average cost of a gallon of petrol, now at $3.72, could have serious implications for Trump's re-election efforts if unresolved before the upcoming midterm elections.

As Trump advocates for increased military actions while dismissing foreign support, he faces the undeniable challenge of ensuring that his strategies align with both domestic interests and international complexities.