Support Waning, Romney Decides Against 2016 Bid

On a ski lift high above the powdery slopes of Deer Valley, Utah, Mitt Romney made it clear: His quest for the White House, which had dominated nearly a decade of his life, was coming to a close.

In a talk with his eldest son, Tagg, between runs down the mountain on Monday, Mr. Romney, 67, said he had all but decided against a third bid for the White House.

The conversation, a