US President Donald Trump has fired veterans affairs secretary David Shulkin in the wake of a bruising ethics scandal and a mounting rebellion within the agency.

President Donald Trump has a "very strong and a very probable possibility" of completing his presidency "with no medical issues".

US president Donald Trump is "in excellent health", according to a White House doctor who performed a routine medical.

US president Barack Obama is undergoing medical tests at a military hospital just outside Washington after complaining of a sore throat, the White House has revealed.