Democrats have been forced to postpone a vote on President Joe Biden’s ambitious $1.75 trillion budget bill, but plan to move forward with a vote on the bipartisan $1.2 trillion infrastructure bill. The decision to postpone the budget vote, coming after negotiations with moderates fell through, is another loss for the party. Biden’s legislative agenda is now months off schedule, as leadership still cannot rally enough votes behind either bill to advance them individually or together. But if Democrats manage to pass the infrastructure bill, it will be a much-needed win for the party, still reeling from the disappointing results of the Virginia and New Jersey gubernatorial elections. 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 on Friday, it was clear that these divisions persisted. In a Tuesday letter …