President Donald Trump told Axios he is planning to terminate birthright citizenship, potentially setting up another constitutional standoff.

Trump said Monday he will sign an executive order that would remove the right to citizenship for babies of noncitizens and undocumented immigrants born on U.S. soil.

"It was always told to me that you needed a constitutional amendment. Guess what? You don't," Trump said in the interview by Axios on HBO, the news site's new documentary series.

"We're the only country in the world where a person comes in and has a baby, and the baby is essentially a citizen of the United States ... with all of those benefits," Trump said. "It's ridiculous. It's ridiculous. And it has to end."

"It's in the process. It'll happen ... with an executive order."

However, Canada and many other countries grant birthright citizenship.

Opponents will argue that it's not within the president's power to change birthright citizenship.