Europe’s New Reality: Trump May Not Quit NATO, but He’s Already Undercutting It

European officials knew the president’s win would threaten the fundamental precepts of the post-World War II order. But the speed at which it is unraveling has created a crisis of enormous proportions.

Elon Musk Is Focused on DOGE. What About Tesla

Mr. Musk, one of President Trump’s main advisers, has not outlined a plan to reverse falling sales at the electric car company of which he is chief executive.

Janno Lieber, Congestion Pricing’s Biggest Booster, Prepares to Take on the White House

Janno Lieber, head of the M.T.A., has helped steer the tolling program through lawsuits and a last-minute pause. He now will face off with President Trump.

Clean Energy Was Lifting Manufacturing. Now Investment Is in Jeopardy.

With the Trump administration reversing support for low-carbon power, the business case for making wind, solar and electric vehicle parts gets weaker.