As divides between Democratic moderates and progressives continue to threaten the passage of the infrastructure and budget bills, Democratic leaders insist that the two pivotal pieces of legislation will pass. On Friday, President Joe Biden went to the House to negotiate between the two wings. Moderates have demanded a swift passage of the $1.2 trillion infrastructure bill, which passed through the Senate by a bipartisan vote. Progressives have demanded that the much more partisan $3.5 trillion budget bill be passed before the House even considers the infrastructure bill. Each group has threatened to tank the priorities of the other if their demands go unmet, and each controls enough votes to follow through on these threats. In the Senate, divisions persist as well. Recently, moderate Sens. Kyrsten Sinema (D-Ariz.) and Joe Manchin (D-W.Va.) reiterated their opposition to the budget bill, which cannot pass without their support. Biden, who has been deeply …