WASHINGTON, Aug. 21 (Xinhua) -- U.S. President Donald Trump said on Wednesday that his administration is seriously considering an executive order to end birthright citizenship.

"We're looking at that very seriously," Trump told reporters when leaving the White House for the U.S. state of Kentucky.

"Birthright citizenship, where you have a baby on our land - walk over the border, have a baby, congratulations, the baby's now a U.S. citizen," said the president. "It's, frankly, ridiculous."

Trump promised ending the birthright citizenship during his 2016 presidential campaign and once revived the idea last year, according to a report of The Hill.