Democrats have been forced to postpone a vote on President Joe Biden’s ambitious agenda, consisting of the $1.2 trillion bipartisan infrastructure bill and the $1.75 trillion budget bill. The decision to postpone the vote, coming after negotiations with moderates fell through, is another loss for the party. Their legislative agenda is now months off schedule, as leadership still cannot rally enough votes behind either bill to advance them individually or together. Divisions in the party have now plagued leadership for months, causing Democrats across the ideological spectrum to grow increasingly frustrated. In the days leading up to the scheduled vote...