Donald Trump Jr. said Monday he would go to “great lengths” to prevent GOP presidential candidate Nikki Haley from joining his father’s campaign.

Trump Jr. said during a Christmas Day interview that he views Haley as the “preferred candidate” of the Washington establishment.

“I wouldn’t have her on, and I would go to great lengths to make sure that that doesn’t happen,” Trump Jr. said on Newsmax’s “The Balance.”

“Nikki Haley wants never-ending wars,” he continued. “She’s a puppet of the establishment in Washington D.C. She’s the new favorite candidate of the billionaire class, because they want control — no different than academia at Harvard and using, you know, their billions to exercising influence. They want someone they control. Ron DeSantis has proven that he doesn’t have what it takes to be on that stage. He’s embarrassed himself that way. She’s now the preferred candidate.”