Mitt Romney took a swipe at Donald Trump Wednesday, saying he won’t win the Republican nomination and criticizing some of his positions.
Romney, the 2012 GOP nominee who lost to President Obama, was speaking at the Washington Ideas Forum when he said, “My party has historically nominated someone who’s a mainstream conservative and someone who has a foundation in foreign policy,” MSNBC reports.
He also called Trump’s position on the Islamic State of Iraq and Greater Syria (ISIS) “absurd and dangerous.” On 60 Minutes, Trump recently advocated that the U.S. not fight against ISIS in Syria, but rather allow Russia to take on the terrorist organization instead.
Trump responded on Twitter on Thursday:
Trump endorsed Romney in 2012, but relations between the two have cooled since Romney lost the election. This isn’t the first time Romney has spoken out against Trump during this cycle; he also criticized Trump over the summer for his inflammatory remarks about undocumented immigrants in his campaign launch.
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Write to Tessa Berenson at tessa.Rogers@time.com