Washington: It was supposed to be a triumphant Rose Garden news conference for US President Donald Trump. The US, Canada and Mexico had reached a new trade deal, an update of the decades-old NAFTA, which he has deemed a "disaster".

Then, as has been known to happen during Trump's news conferences, things took a turn. He opened the question-and-answer session by inexplicably deriding a female reporter. Here is Trump calling on ABC News' Cecilia Vega for the first question of the news conference:

Trump: "She's shocked that I picked her. She's in a state of shock.

Vega: "I'm not. Thank you, Mr President."