In a tense exchange (video below), Republican Sen. John McCain of Arizona verbally sparred with a Fox News reporter on Oct. 17, calling his question "stupid."
In light of McCain and President Donald Trump's infamously strained relationship, Fox News reporter Peter Doocy asked, "Has your relationship with the president frayed to the point that you are not going to support anything that he comes to you and asks for?"
McCain responded with agitation, calling the reporter's question "stupid," according to The Washington Post.
"Why would you say something that stupid?" the senator and former presidential candidate responded. "Why would you ask something that dumb? ... You mean that I am somehow going to behave in a way that I'm going to block everything because of some personal disagreement? That's a dumb question."
McCain's animosity toward Trump began long before the president was elected. In 2015, Trump said that McCain was "not a war hero," even though the senator was a prisoner of war for years during the Vietnam War.
After the 2016 election, McCain said he would refuse to answer any Trump-related questions until Jan. 1, only a few weeks before Trump's inauguration.
"On the first of January, I promise to start answering these stupid, idiotic questions," said McCain in December 2016.
McCain has consistently been a thorn in Trump's side, casting one of the deciding votes that ultimately killed the Republicans' chances of repealing and replacing the Affordable Care Act.
McCain maintains he wants to work with the president to effect positive change. Only moments before Doocy's question, McCain told MSNBC he's not looking for a fight.
"I'm not interested in confronting the president," he told a reporter. "I'm interested in working with the president."
But on the same day, the senator also said he wasn't afraid of taking the president head-on after Trump issued a warning saying that he would "fight back" against McCain, according to The Hill.
The threat came in response to an Oct. 16 speech, where McCain called the current political climate "half-baked, spurious nationalism cooked up by people who would rather find scapegoats than solve problems."
The following day, Trump said during a radio interview that he won't stand for McCain's insults for much longer.
"At some point, I fight back and it won't be pretty," he said.
McCain, who was diagnosed with brain cancer in July, shot back: "I’ve faced far greater challenges than this."