But in the age of Trump, reporters have a new purpose, a more pressing social contract with the public to cover the president fairly but fearlessly. They need to zero in even as they broaden their horizons. The news media should cover Trump motivated by four pillars of political journalism: be fair, be relentless, focus on substance and serve as respectful adversary. How would that translate into actual coverage? 1. Be fair. Give Trump his due: He won. As his appointments and policies emerge, they should be examined in turn and in detail, looking at their component parts. Separate news...