It is true, both 1 Republican, the Clintons and the DNC paid for this dossier to be put together. 

The real corrupt part though is....is how Democrats while in Office used this dossier (knowing it was fake) to proceed to 

1 - Use as a basis for an FBI investigation
2 - Used the dossier to base the FISA warrants on
3 - ultimately spied on Trump's campaign via the FISA warrants. 
4 - Used this dossier to build an investigation against Trump (again while knowing it was fake)
5 - Used the media for the last year to spread "fake news" about Trump and his team...based on this knowing false dossier. 

The GOP is being rebuilt right now, the supporters and voting base is making sure of that. McCain, Ryan, Flake, Corker, Mitchell et al, will be gone by the end of 2018 and that portion of the Swamp will be drained (a bit). 

The Democrats, well...they have next to nothing right now, and with this information coming out in the MSM (1 year late), they will be forced to purge and rebuild.