'I'm a very stable genius': Trump insists he won't change his mind about leaving NATO

President Donald Trump reprised one of his most infamous boasts during a news conference threatening to abandon NATO over alliance spending.

Trump threatened to leave NATO if allies do not immediately increase their funding of the treaty organization — which he has derided as obsolete -- ahead of a surprise news conference from Brussels.

“NATO is helping Europe more than it’s helping us,” Trump told reporters.

One reporter asked the president if he would perhaps change his mind about the demand for immediate spending hikes once he boarded his plane and had time to reflect, but Trump insisted he would not.

"Oh, that's other people that do that," Trump said. "I'm very consistent. I'm a very stable genius."