► Subscribe to FT.com here: http://bit.ly/2r8RJzM<br /><br />2017 was a year of political shock and disruption, with Donald Trump upending the rules of politics with his Twitter account. The FT's US managing editor Gillian Tett says that trend is set to continue. The big question is how the Democrats respond.<br /><br />► Subscribe to the Financial Times on YouTube: http://bit.ly/FTimeSubs<br /><br />For more video content from the Financial Times, visit http://www.FT.com/video<br /><br /><br />Twitter https://twitter.com/ftvideo<br />Facebook https://www.facebook.com/financialtimes