Sen. Rand Paul warned of a "disastrous election" if President Donald Trump did not end his war against Iran.

"As far as the reasons for the war, there have been many different reasons floated, but none of them, I think, have been very convincing," Paul told Fox Business host Maria Bartiromo on Tuesday. "Another statement has been made, well, they're a week away from a nuclear weapon. You can take clips from the '90s all the way through the present of people arguing that they're a week away from nuclear weapons."

"We were also told their nuclear weapons were obliterated," he noted. "So I guess I don't think the arguments are valid. And I think war should be the last resort, not the first resort."

"My fear is that we get dragged into a long process here and that chaos results. Order doesn't come from this."

Paul said he also opposed a supplemental spending bill for the Pentagon.

"I'm very, very concerned about the debt," he said. "And a half a trillion dollars to the military budget is fiscally irresponsible."

Bartiromo wondered if Paul was leading a split in the Republican Party that would lead to midterm losses.

"I don't think a split party is the problem," the senator replied. "I think the 2026 elections, already, we are behind the eight ball as far as the electoral process. I think if you add in high gas prices, high oil prices. And if we are still bombing Iran with kinetic action, people don't want to call it war, but if there's still kinetic action that causes oil to be over $100, I think you're going to see a disastrous election."