(NEW YORK) Donald Trump on Tuesday addressed criticism of a new practice at his rallies that has been compared the “Heil” salute from Nazi Germany, dismissing the controversy as “ridiculous” before saying he would look into ending it.

“I don’t know about the Hitler comparison. I hadn’t heard that, but it’s a terrible comparison. I’m not happy about that certainly,” Trump said on ABC’s “Good Morning America.”

In recent weeks, Trump has started asking voters to raise their right hand and pledge to support him — creating an image that many have argued evokes the rise of Adolf Hitler, particularly when coupled with his sharp rhetoric toward minority groups like Mexicans and Muslims.

During an interview on “The Today Show” on NBC, host Matt Lauer asked Trump to consider the historical context of the image.

The Republican front-runner at first dismissed the controversial comparison, calling it “ridiculous” and “a big stretch,” and insisting rally attendees were just “having fun.”

“Well, I think it’s ridiculous, I mean we’re having such a great time,” Trump said. “Sometimes we’ll do it for fun, and they’ll start screaming at me, ‘do the swear-in, do the swear-in!’ “

“Honestly until this phone call, I didn’t know it was a problem,” he added. “That this would be brought up this morning, I’m surprised to hear it.”

But pressed if he would stop asking supporters to make the pledge now that he was aware of the controversy, Trump said, “Well, I’ll certainly look into it.”

“I mean I’d like to find out that that’s true, but I would certainly look into it, because I don’t want to offend anybody. But I can tell you that it’s been amazingly received, but I will certainly look into that.”

Trump also discussed the issue in an interview on MSNBC’s “Morning Joe.”

“I say jokingly, ‘Raise your hand if you swear to endorse me,’ ” he said. “The entire place is practically laughing and having a good time. They’re raising their hands in the form of a vote, not in the form of a salute.”