A 2017 winner of the Nobel Peace Prize on Tuesday tore into President Trump Donald John TrumpOmar fires back at Trump over rally remarks: 'This is my country' Pelosi: Trump hurrying to fill SCOTUS seat so he can repeal ObamaCare Trump mocks Biden appearance, mask use ahead of first debate MORE over the expected announcement that he will pull the U.S. out of the Iran nuclear deal, saying that doing so would be “so stupid.”

Beatrice Fihn, executive director of the International Campaign to Abolish Nuclear Weapons (ICAN), tweeted an all-caps message expressing her frustration with the decision.

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“I see lots of smart people making eloquent arguments to why it's wrong to violate the Iran deal and I just want to add mine,” Fihn tweeted. “This is so stupid! I can't believe the rest of the world has to put up with the stuff right now, like we don't have other problems on our mind at the moment?”

THIS IS SO STUPID! I CAN'T BELIEVE THE REST WORLD HAS TO PUT UP WITH THIS STUFF RIGHT NOW, LIKE WE DON'T HAVE OTHER PROBLEMS ON OUR MIND AT THE MOMENT? — Beatrice Fihn (@BeaFihn) May 8, 2018

Trump is expected to announce Tuesday that he will not continue sanctions relief for Iran, the first major step toward ending the Obama-era nuclear pact.

The New York Times reported that the U.S. will reinstate all sanctions that were waived under the 2015 deal, in addition to imposing new penalties.

The move is facing strong opposition from European leaders, who have said that Trump pulling out would cause the deal to fall apart. Trump has long railed against the pact and vowed during the campaign to pull the U.S. out.

British Foreign Secretary Boris Johnson made a last-minute visit to the White House on Monday to argue his case to senior officials, following presidential meetings with French President Emmanuel Macron and German Chancellor Angela Merkel.

But each of the three left the U.S. pessimistic about the deal’s future.