The president also said oil prices won't come down until after the November races, claiming without evidence that Iran wants to impact the election.
Watch: Trump says Iran war will end "immediately" after US midterm elections
US President Donald Trump has said he does not think the Iran war will end until after November's midterm elections, adding that oil prices will not come down until then.
"I think the war's going to end immediately after the election because they can't hold out any longer," Trump said of Tehran on Wednesday.
He made the comments as he headed to Texas for the party's first-ever midterm election convention, when the balance of power could change in the US government.
Trump is facing falling polling numbers and pressure from within his Republican Party to end the war with Iran. On Wednesday, oil prices rose to $100 (£74) for the first time since July due to increased fighting in the Middle East.
"Right after the election, oil prices are going to be tumbling downward," Trump told reporters. "I think it's going to take a little bit longer than the midterm."
He added that Iran was "desperate to try and affect the election, so that we can get a nice weak group of people in there" - an apparent reference to the Democrats - "and leave them alone and let them have their nuclear weapon".
He provided no proof of the election claim. Tehran has repeatedly denied it is seeking nuclear weapons.
At the convention in Texas, Trump echoed some of these lines, saying the price of oil would tumble "as soon as we win the war with Iran".
In his speech, he also referenced dissatisfaction among some Americans on the issue: "Guys come up to me and say, 'I wish you didn't do the war in Iran. Now gasoline is up'".
Trump says Iran war will end 'immediately after' midterms as he heads to Republican convention
Trump also said further negotiations with Iran could possibly happen, "but it's not something we're looking at".
The US president initially predicted the war, which is now in its seventh month, would last only a matter of weeks. The conflict, and its knock-on effects on everything from fuel to groceries, has led to a steep decline in his approval ratings - and pressure from those within his party, including devout supporters, to quickly end the war.
Midterm elections will be held on 3 November, and Republicans are in danger of losing their control on Congress.
At the convention, Trump sought to energise the party ahead of November. Historically, a sitting president's party tends to lose seats in Congress in the midterm elections.
Reporting synthesized and verified under Nexvoro.tech editorial guidelines. Full primary records referenced via BBC World.
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