President Trump offered his critique of the last two nights of Democratic debates in Detroit while speaking to reporters outside of the White House on Thursday.

"I've watched Elizabeth Warren, sometimes referred to as 'Pocahontas,' with her phony ... ancestry that she didn't have ... to me she doesn't have credibility," Trump said of the Massachusetts senator.

Warren squared off with Sen. Bernie Sanders during the first night, when both of them were repeatedly challenged by more moderate candidates about their proposals. Trump reiterated his criticism of Warren's claim that she was Native American and also took aim at her high-cost ideas, such as free college.

Regarding the tussle between Sen. Kamala Harris and Rep. Tulsi Gabbard on the second night of the debate, Trump said, "I think that Kamala did not do well last night. I think Kamala had a bad night last night."

Trump offered rare praise for front-runner Joe Biden, however, noting a significant improvement from the first round of Democratic debating in June. "I think Biden did OK. He came through," the president said. "He came limping through, as I say about 'Sleepy Joe,' he right limped through it. But he got through it, he really did, I think he was OK."

The president concluded that the extensive field seemed to be winnowing. "It's really boiling down to four or five of them, let's face it," he said before moving on.