In what can only be described as a surprising incident, former President Donald Trump turned on one of his biggest supporters Saturday evening.

The former president attacked his GOP presidential rival Vivek Ramaswamy for the first time since both men began their campaign. Trump, on his Truth Social account, noted that Ramaswamy started his campaign as a great supporter before stating that his rival is not MAGA.

Vivek started his campaign as a great supporter, ‘the best President in generations,’ etc. Unfortunately, now all he does is disguise his support in the form of deceitful campaign tricks,” Trump wrote. “Very sly, but a vote for Vivek is a vote for the ‘other side’ — don’t get duped by this. Vote for ‘TRUMP,’ don’t waste your vote! Vivek is not MAGA. The Biden indictments against his Political Opponent will never be allowed in this Country, they are already beginning to fall! MAGA!!!”

Ramaswamy, however, refused to attack Trump in his response to the former president. The GOP hopeful maintained that Trump was the best president of the 21st century.

“Yes, I saw President Trump’s Truth Social post. It’s an unfortunate move by his campaign advisors, I don’t think friendly fire is helpful. Donald Trump was the greatest president of the 21st century, and I’m not going to criticize him in response to this late attack,” Ramaswamy said before highlighting how he has supported the former president through his legal troubles. “I’m worried for Trump. I’m worried for our country. I’ve stood up against the persecutions against Trump, and I’ve defended him at every step. I showed up at the Miami courthouse in solidarity following his first federal indictment. I filed a FOIA demand to the Biden DOJ. I submitted an amicus brief this week with the U.S. Supreme Court calling on them to overturn Colorado’s ruling. I pledged to remove myself from Maine’s & Colorado’s primary ballots if they remove Trump, calling on DeSantis and Haley to do the same.”

Ramaswamy has been a staunch supporter of the former president despite their GOP rivalry. The GOP presidential hopeful was the first Republican candidate who vowed to pardon Trump if elected in 2024. He also vowed to take his name off the Colorado ballot if Trump was kicked off the state’s ballot.