Cover Story: Next week President Donald Trump will hit the 100th day of his second term. To mark the occasion The Economist has put together a special edition of the US section. Their analysis stands back from the day-to-day drama and looks in depth at five areas of public policy where Mr Trump’s ambitions could clash with the courts or even test the Constitution. It is a gripping, sobering read. 
The cover leader assesses how worried you should be. Mr Trump has undoubtedly had the most consequential first 100 days of any modern American president. He is leading a revolutionary project that aspires to remake the economy, the bureaucracy, culture and foreign policy, even the idea of America itself. Mr Trump’s belief in unconstrained executive power—the idea that, as Richard Nixon suggested, if the president does something then it’s legal—is pushing America to its limits. This mercurial extremism has already undermined things that actually make America great: look at what’s been happening to the dollar. 
Will there be resistance? Voters, investors, the courts and Congress can all impose varying degrees of restraint upon Mr Trump. This week there have been new signs that the markets have clout. Elsewhere, the revolution seems remarkably unchecked. Over time, the leader argues, that is likely to change. The question is: how far and how fast?