WASHINGTON — Did the Trump campaign collude with the Russians to try to ensure that Donald Trump would be elected president in 2016? It’s one of the central questions of congressional investigations into Russian meddling, but Congress is unlikely to answer it when their probes conclude in the next few …

WASHINGTON — President Trump said Thursday he will soon place tariffs on steel and aluminum imports — a move that could trigger retaliation from trade partners who may target American products. “We’ll probably see you sometime next week — we’ll be signing it in,” Trump said after discussing tariffs with …

New images of Mars’ two moons, Phobos and Deimos, could help shed light on how the mysterious rock operates in their orbit. The photos, which the European Space Agency released this week, show the moons’ cratered surfaces and gave scientists a chance to update calculations about how they are positioned …