It is ridiculous.
What’s even more ridiculous is believing the children of foreigners can be natural born citizens, eligible to be President.
But Mr. Trump’s plan met with swift pushback from some even in his own party on Tuesday. House Speaker Paul D. Ryan of Wisconsin, who is retiring, said in an interview that the president “obviously” cannot eviscerate birthright citizenship by executive order.
https://www.nytimes.com/2018/10/30/us/politics/trump-birthright-citizenship.html