A brief guide to US politics which provides a non-partisan assessment of the ongoing challenges faced by American democracy not least from Trump and his supporters. Cooper explains key aspects of recent US political history to give the background to recent dangerous developments including how political groups have reshaped since the 1964 Civil Rights Act; the rise of Newt Gingrich and the Tea Party; the profound impact of the internet and social media; and the threats posed to the electoral system by the growth of extreme polarization and growing irrationality. He shows how these recent developments have their roots in the deeper past with the establishment of the political system in the first place and all the knocks and tweaks to it along the way. He also reveals how as a result of increasing politicisation the US Supreme Court is now exacerbating polarization instead of acting as an effective check on executive power.