California wants its own strict air pollution standards. Trump has other ideas.
The latest move from the Trump administration threatens to set in motion a massive legal battle and plunge automakers into uncertainty. The Post’s Juliet Eilperin explains how much power a president has over national environmental policy.
What happens when a president overrides science?
Weather editor Andrew Freedman explains how Trump’s inaccurate hurricane tweet led to worrying implications for NOAA and the NWS, and what happens when a president politicizes scientific institutions.
Summer is an opportunity for presidents. Did Trump take it?
Some of President Trump’s allies described a lost summer, full of controversies and missed opportunities. White House reporter Ashley Parker explains how presidents have strategized in summer, and how Trump’s approach is different.
Trump’s latest trade war escalation: Ordering businesses out of China. Can he do that?
The commercial war between two economic superpowers has entered a new phase. The Post’s Jeanne Whalen explains whether President Trump’s edict to U.S. business is enforceable and what the latest trade war developments mean for the global economy.
Does the president have the power to buy Greenland?
President Trump abruptly canceled a trip to Denmark because the country’s prime minister wouldn’t discuss the purchase of Greenland. Economic policy reporter Damien Paletta explains whether Trump’s effort to purchase Greenland is as unusual as it seems.