A US federal judge has ordered former White House counsel Donald McGahn to appear before Congress in a setback to Donald Trump’s effort to keep his top aides from giving evidence.

Revelations about Donald Trump’s interactions with Ukraine’s president are shaping up to be the most serious threat to his presidency so far, surpassing even the special counsel investigation into Russian election interference that dogged the first two years of his administration.

President Donald Trump's historic first steps into North Korea sparked a scuffle between reporters and North Korean security guards, with officials shoving and trying to block the press.

Melania Trump has hit back at Donald Trump's first wife for referring to herself as "first lady".

There is confusion as to whether US presidential candidate Donald Trump will visit Ireland next week.