Immigration advocates brushed off President Donald Trump`s statements recently about ending birthright citizenship through an executive order, saying he simply would be unable to do so. In an interview with Axios on HBO, the president once again floated the issue, one of the touchstones of his 2016 campaign. "It was always told to me that you needed a constitutional amendment. Guess what? You don`t,” stated Trump, adding: "You can definitely do it with an Act of Congress. But now they`re saying I can do it just with an executive order. "The president stated, incorrectly: "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. "It`s ridiculous. It`s ridiculous. And it has to end. "Trump stated that an executive order was in the works. Birthright citizenship is guaranteed in the U.S. by the citizenship clause of the 14th Amendment, which states: “All persons born or naturalized in the United States, and subject to the jurisdiction thereof, are citizens of the United States and of the State wherein they reside." Conservatives have argued that the clause was not meant to include undocumented residents and those on temporary visas, such as H-1Bs, H-4, and other employment-based visa holders.