WASHINGTON — Vice President Joe Biden and his wife are retreating from Washington for a week in South Carolina with little on their schedule but a momentous decision: whether he should run for president.

Biden’s advisers say he hasn’t indicated which way he’s leaning.

But since reports surfaced saying the vice president was taking a fresh look at running, potential campaign staffers have begun sending in their resumes, aides said, and longtime Biden donors have offered to help if he gets in the race.