President Donald Trump isn’t too happy about former President Barack Obama’s recent comments about the existence of extraterrestrials.

In fact, he says the former president’s assertion on a podcast that aliens from outer space are “real” was a “big mistake.”

Obama recently told podcaster Brian Tyler Cohen that ETs are “real, but I haven’t seen them, and they’re not being kept in Area 51. There’s no underground facility unless there’s this enormous conspiracy, and they hid it from the president of the United States.”

In addition, presidential daughter-in-law Lara Trump claimed Trump already has a speech about the existence of extraterrestrials ready to engage during a podcast interview on Wednesday.

But White House press secretary Karoline Leavitt said the same day that “a speech on aliens would be news to me,” while admitting it “sounds very exciting, though.”