Greene wrote on X, formerly Twitter, that Ocasio-Cortez, who had said Saturday's attack was "absolutely and clearly grounds for impeachment," was a "pathetic little hypocrite."
Newsweek reached out to representatives for Greene and Ocasio-Cortez via email outside of regular working hours for comment.
The conflict between Israel and Iran has escalated dramatically over the past few days. Israel initially struck Tehran and other cities in "Operation Rising Lion," a campaign it said was designed to preempt a planned Iranian attack and disrupt its nuclear capabilities, which Iran has said are for peaceful purposes.
Iran has since retaliated, though Israeli defense systems, bolstered by U.S. military technology, have largely intercepted incoming missile fire. The U.S. is Israel's closest ally and provides billions of dollars in military aid annually.
Trump announced military action on Iran on Truth Social on Saturday evening and said that the U.S. has attacked sites in Fordow, Natanz, and Isfahan.
There has been a mixed response to the attacks on both sides of the political spectrum. Democrats have either criticized the president for pulling the U.S. into another conflict or praised him for the military move. Republicans and MAGA have also been split in their response, with a recent YouGov poll showing that only 23 percent of Republicans say the U.S. should be involved in the conflict, putting politicians like Greene in a tough spot.
Ocasio-Cortez branded the decision to attack Iran "disastrous," and said it was "a grave violation," of both the Constitution and Congressional War Powers.
Greene wrote in response that Ocasio-Cortez was a "hypocrite."
"YOU fully supported our military and IC running the proxy war against Russia in Ukraine," she wrote, adding "You don't get to play anti-war and moral outrage anymore."
The U.S. provided support to Ukraine under former President Joe Biden. Americans have long been divided down partisan lines over aid to Ukraine. A Pew Research Center poll in February 2025 found that Republicans were more likely than Democrats to say that the U.S. was giving Ukraine too much support, by 47 to 14 percent.
And support for U.S. involvement in Iran is also fractured, with MAGA specifically being divided on the issue. Greene has long been a vocal supporter of Trump and a MAGA enthusiast, but has positioned herself away from the president on this issue and spoken out against U.S. involvement in the conflict.
On Saturday, Greene wrote on X "Every time America is on the verge of greatness, we get involved in another foreign war," adding,"This is not our fight. Peace is the answer," in a post viewed over 10 million times as of reporting. Earlier in the week, she had written on X "Americans want cheap gas, groceries, bills and housing" and not a foreign war.
A recent YouGov poll found that among all respondents, only 16 percent supported U.S. involvement in the conflict between Iran and Israel, with 60 percent opposed.
Representative Marjorie Taylor Greene previously told Newsweek: "It's no surprise that a majority of Republicans oppose U.S. intervention in Israel's war with Iran...In November, voters cast their ballots to end the forever wars. I'm not surprised one bit. Americans want our government focused on solving our problems here at home, and we have many to solve."
President Donald Trump, in a post on Truth Social: "Congratulations to our great American warriors. There is not another military in the World that could have done this. NOW IS THE TIME FOR PEACE!"
Senator John Fetterman, a Pennsylvania Democrat, wrote on X: "As I've long maintained, this was the correct move by @POTUS. Iran is the world's leading sponsor of terrorism and cannot have nuclear capabilities. I'm grateful for and salute the finest military in the world."
Representative Rashida Tlaib, a Michigan Democrat, said in a statement shared on X: "President Trump sending U.S. troops to bomb Iran without the consent of Congress is a blatant violation of our Constitution. The American people do not want another forever war."
Iran's leadership under Supreme Leader Ali Ayatollah Khamenei will decide whether to retaliate for the U.S. strikes or whether to continue with negotiations. Reactions of global powers Russia and China, which are close to Iran, will also be critical.