President Donald Trump suggested the U.S. could seize Iran’s oil and reopen the Strait of Hormuz, arguing that more time in the war would make it possible.

His remarks mark an escalation in rhetoric, though he did not explain how such a plan would be carried out.

The U.S. military has indicated it is not prepared to safely escort ships through the strait, which remains under Iranian threat.

Trump has also floated extending the war to achieve these goals, despite earlier expectations of a shorter conflict, the AP has reported.

The proposal has raised concerns about legality, feasibility, and the risk of prolonging the war.