President Donald Trump lashed out Tuesday at allies who have been unwilling to do more to support the U.S. war effort against Iran, telling them to “go get your own oil” and saying it was not America’s job to secure the Strait of Hormuz.

The president said the military could end its offensive in two to three weeks and that the U.S. “will not have anything to do with” what happens next in the strait that has been closed by the Islamic Republic. Instead, he told reporters, the responsibility for keeping the vital waterway open will rest with countries that rely on it.

There’s “no reason for us to do this,” Trump said after signing an executive order that seeks to restrict mail-in voting. “That’s not for us. That’ll be for France. That’ll be for whoever’s using the strait.”

The White House said Trump would deliver a prime-time address Wednesday evening to update the public on the war.

In other developments, the closure of the strait sent average U.S. gas prices past $4 a gallon, and U.S. strikes hit the central city of Isfahan, sending a massive fireball into the sky. Tehran attacked a fully loaded Kuwaiti oil tanker in the Persian Gulf.

The attacks showed the intensity of the war more than a month after the U.S. and Israel launched it. The conflict has left more than 3,000 dead and caused major disruptions to the world’s supply of oil and natural gas, roiling global markets and pushing up the cost of many basic goods.

Trump, whose comments have vacillated between talk that diplomatic progress is being made with Iran and threats to widen the war, had earlier shared footage of the attack on Isfahan.