Early last year American democracy came under attack from within. Supporters of defeated President Donald Trump stormed the US Capitol and provoked deadly violence. Stephen Sackur speaks to the Democrat Congressman Jamie Raskin, a key player in the subsequent impeachment of Trump and the Congressional investigation into the 6 January assault. All this, as Congressman Raskin has faced up to personal tragedy - what happens when the pillars of personal and political life come crashing down all at once.