It was not immediately clear if the President would issue such an order before the elections; for example, last week Mr. Trump repeatedly said he would release a new tax cut plan for the middle class before the elections, but no details have been forthcoming.
"The President is looking at all options," White House Press Secretary Sarah Huckabee Sanders told reporters.
While the President said Wednesday that 'many legal scholars agree' with his argument that the children of illegal immigrants who are born in the U.S. don't deserve citizenship, there are a large number of legal scholars and politicians who do not agree with Mr. Trump on that matter.
"If Trump could end birthright citizenship he he could issue an executive order saying the First Amendment doesn’t restrict his conduct as president," said constitutional expert Lawrence Tribe, as others argue an actual amendment to the Constitution would be needed to make such a change.
"If you don't like it, amend it," wrote Steve Vladeck, a law professor at the University of Texas.
A day after House Speaker Paul Ryan had said the President did not have the authority to change the 14th Amendment via executive order, the President rebuked the outgoing Speaker.
But it was clear within GOP ranks in the Congress, that others strongly agreed with Ryan, and not the President.
"I strongly disagree with the proposed executive order," said Rep. Mario Diaz-Balart (R-FL), as the President faced new resistance from within his own party over the meaning of the 14th Amendment.
"All persons in the U.S., thus, except for accredited foreign diplomats in specified instances, are subject to U.S. laws, and, if born in the U.S., are U.S. citizens," Diaz-Balart said.
In conservative circles, there were some who warned that it was wrong when President Obama used executive actions on immigration - and that it's wrong as well for President Trump to do it, especially since this involves tinkering with the interpretation of the Constitution, not just a statute.
Even the Wall Street Journal editorial page - no bastion of liberalism - said the President was wrong.
"President Trump really, really wants to make the midterm election about immigration, and for a while it looked like he had an edge due to Democratic excess. But with this week’s pre-election vow to end birthright citizenship in America by executive order, Mr. Trump has driven into his own constitutional ditch," the paper's editorial board wrote.
Meanwhile, Democrats denounced the President's declarations, saying it was nothing more than political red meat for his Republican base of supporters.
"The Master of Distraction continues to foment bigotry to distract from his failed agenda, hoping his base rhetoric will motivate his base," said Rep. Lloyd Doggett (D-TX).