Donald Trump
Media playback is unsupported on your device
Video

Donald Trump hits back at 'disastrous' Barack Obama

Donald Trump has dismissed Barack Obama's time in the White House as a "disaster" after the US president said he was not fit to succeed him.

"He's been weak, he's been ineffective," Republican candidate Mr Trump said of Mr Obama in a Fox News interview.

Go to next video: Obama: Trump 'unfit' to be president