Will there ever be a post-Brexit US-UK trade deal?

The UK prime minister and US president are also expected to discuss climate change, which comes as China’s President Xi has pledged to end funding for overseas coal plants. Newsnight’s David Grossman reports. Emily Maitlis is joined by Director of climate and sustainability for ODI Global, Sarah Colenbrander, Republican Congressman Brendan Boyle and Conservative peer Lord Hannan.