President Donald Trump has placed a new condition on a nuclear agreement with Saudi Arabia a day after formally approving it, saying the country now must join the Abraham Accords.

DUBAI – The Trump administration backs a nuclear energy pact with Riyadh allowing Saudi Arabia to enrich uranium and process spent atomic fuel, two sources have said, a move that may worry regional st...

On Wednesday, Mr. Trump took the reverse approach to Saudi Arabia, its close ally in the region.