Some delegates appeared willing to form a united front.
“The stakes are too high. In the end it’s going to be either Hillary Clinton or Donald Trump and it’s not even a close call,” said Paul Czisny, a 57-year-old delegate from Wisconsin who had supported Sanders.
New polls showed Trump surging since his confirmation last week as the Republican presidential nominee, with a CNN poll putting him three percentage points ahead of Clinton — a six-point post-convention bump.