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South Carolina Republican Sen. Lindsay Graham predicted Friday's Oval Office shouting match could end U.S. support for Ukraine.

“I have never been more proud of the president. I was very proud of JD Vance standing up for our country. We want to be helpful. What I saw in the Oval Office was disrespectful, and I don't know if we can ever do business with Zelenskyy again,” Graham told reporters after the meeting. “The way he handled the meeting, the way he confronted the president, was just over the top.”

Graham suggested that Zelenskyy may need to consider resigning.

“He either needs to resign and send somebody over that we can do business with, or he needs to change,” Graham said.

Graham was a longtime Russia hawk and a defender of assistance to Ukraine, but like many Republicans has shifted his tone toward the conflict in alignment with Trump's "America First" foreign policy missive.

-ABC News' John Parkinson

After their blow up in the Oval Office, Zelensky left right after the press was escorted out and went to a holding room, a White House official told ABC News.

The president then allegedly huddled with his team, and the president demanded he leave the White House and come back when he's serious, according to the official.

Secretary of State Marco Rubio and National Security Advisor Mike Waltz informed Zelenskyy of the president's decision, the official said.

-ABC News' Mary Bruce

Zelenskyy released a statement on X following his departure from the White House.

"Thank you America, thank you for your support, thank you for this visit. Thank you @POTUS, Congress, and the American people. Ukraine needs just and lasting peace, and we are working exactly for that," he said.

With Ukraine's future in the balance, a high-stakes meeting on Friday between President Donald Trump and Ukraine's Zelenskyy devolved into a shouting match.

The stunning exchange, before cameras and one unlike any other in the Oval Office in modern times, saw Trump and Vice President JD Vance rebuke Zelenskyy for his handling of the war, again falsely blaming the Ukrainian leader for a conflict that began when Russia's Vladimir Putin launched a full-scale invasion.

Zelenskyy was in Washington to sign an agreement that would give U.S. access to Ukraine's mineral resources. But after the Oval Office spat, Trump issued a terse statement claiming Zelenskyy wasn't ready for peace and the Ukrainian leader left the White House shortly after.

Read more about the key takeaways from the explosive meeting here.