The American president says that attacks on Iran will be significant in the coming weeks.
"We are working systematically to ensure that they cannot be a threat to the United States or exercise any power beyond their borders," Trump says.
An AP poll shows that a majority of American voters think the war in Iran has gone too far, while oil and fuel prices have risen sharply since the war began. Trump tried to calm critics during the speech.
"We produce more oil and gas than Russia and Saudi Arabia combined."
Trump has previously threatened to strike at energy infrastructure in Iran, and in last night's speech, there were further threats against both power plants and oil production.
"We haven't struck at their oil, even though it's the easiest target of all. We could do that, and then it would be gone."
Trump believes that an attack on Iran's oil would make it "impossible" for the country to rebuild after the war.
Trump also repeated the message that several countries should “show courage” and commit to securing shipping through the Strait of Hormuz. This time, he singled out China, Japan and South Korea.
"Just take it and protect it," he says.
