WASHINGTON (AP) — Top Democrats abruptly postponed an expected House vote Friday on their 10-year, $1.85 trillion social and environment measure, as infighting between progressives and moderates once again sidetracked the pillar of President Joe Biden's domestic agenda.

In a bid to hand him a needed victory, leaders still prepared to try pushing an accompanying $1 trillion package of road and other infrastructure projects through the chamber and to his desk. But even the fate of that popular bill, expected to create jobs in every state, was in question.

The scrambled plans cast a fresh pall ov...