The middle or center or establishment or whatever label you put on it Democrats have all the money. The big donors. Progressives that move to the center are often cornered by that. More often than not whomever has the most money wins in this fucked up broken system.
Corporatist Democrats.™️ They are undeniably right of center when courting literal Cheneys. Not 20 years ago, Dick was considered the furthest accepted reach of conservatism. Progressives must start local before looking higher, which Working Families Party does well, upsets over corporatists aplenty.