Are we witnessing a shift in the balance of media power? The Labour party says emergency laws are needed to make social networks "criminally responsible" for anti-vaccine content their users post. Meanwhile, over in the US both Republicans and Democrats are vowing to change the way the likes of Twitter and Facebook are regulated. And could it also represent the birth of an alternative media? Donald Trump is rumoured to be plotting a new channel to rival Fox News.Guests: Amélie Pia Heldt, Leibniz-Institute for Media Research, Tom Wainwright, The Economist media editor, Shayan Sardarizadeh, BBC Monitoring disinformation journalist, and Mathew Ingram, Chief Digital Writer at Columbia Journalism ReviewPresenter: Joe TidyProducer: Richard Hooper