Much has been written about Donald Trump's physical greetings.

Whether it's a strong handshake or a firm embrace, the president apparently likes to dominate an opening exchange in what has been described as a diplomatic power play.

It is no surprise then that Hillary Clinton wanted to be prepared as possible for when she met Mr Trump at the first televised presidential debate during the campaign.

Philippe Reines, a Democratic strategist who worked with Mrs Clinton's campaign, posted a short video on Twitter showing the candidate practise the greeting.