That's the title of this article by Mike Konzcal. Then, read this article in The Hill explaining that "[t]he battle pits moderate Democrats up for reelection this year in states such as Missouri, West Virginia, North Dakota and Montana against Sen. Elizabeth Warren (D-Mass.) and other progressives, and comes as the party braces for primary fights between the left and center." The Center for American Progress has this useful fact sheet. Go here for the Congressional Budget Office's analysis of the roll back bill.