Neil deGrasse Tyson left fans divided this week by posing with red hats that featured variations on President Donald Trump’s “Make America Great Again” slogan.

On Monday, the celebrity astrophysicist posted a photo on his social media platforms in which he was seen holding four hats that read, respectively, “Make America Great Again,” “Make America Smart Again,” “Make Lying Wrong Again” and “Relax It’s Just A Red Hat.”

“Decisions, Decisions,” Tyson wrote in the accompanying caption. “Which hat to wear today?”

On X, formerly Twitter, he also ran a poll that allowed viewers to vote in favor of the hat they preferred. As of Wednesday, “Make Lying Wrong Again” was in the lead.

Fans, however, seemed unsure if Tyson intended it to be viewed as an endorsement of Trump, or a skewering of the president and his administration.

“Nothing about the MAGA agenda (which you are clearly attempting to desensitize people to here) is funny,” one person wrote on Instagram. “As a scientist, and especially a scientist with a platform, you should be ashamed of yourself.”

Added another, “Sorry Neil, have to unfollow. It’s crazy to me that you would follow a white nationalist cult leader that is destroying the greatest country in the world. My mind is blown.”