It's fascinating that any mention of Ukrainian and DNC collusion is automatically labeled a discredited or debunked conspiracy theory, while the Trump-Russia saga was allowed to stretch for nearly three years, propagated by a feverish media who hastily filled the airwaves and web with even the most obscure, anonymously sourced "evidence of collusion(!)" they could get their hands on.
As we've said before- any time you hear one of these people label something a "debunked conspiracy theory," the opposite is probably true. Your internal alarms should go off, and you should do your research. Here are a few articles to get you started:
Politico reported that DNC contractors got information for Ukrainian embassy officials to damage Paul Manafort and connect the campaign to Russia. This article even has quotes from the DNC contractor herself:
Nellie Ohr, researcher for Fusion GPS, who the Clinton Campaign hired to create the Steele dossier, got her information from Ukrainian lawmakers:
Major Source of Nellie Ohr’s Research Given to FBI Was Ukrainian Official Whose Early Release From Prison Is Credited to…Hillary Clinton
Christopher Steele's sources for his anti-Trump dossier that was fed to the FBI and media... were Russians...
Pretty much all of the major bombshell stories the media went into a frenzy over during the Russia investigation turned out to be fake or wrong:
No Collusion: 10 anonymously sourced Trump-Russia bombshells that look like busts - Washington Examiner
The Latest Russia Collusion ‘Bombshells’ Are Big, Fat Duds- The Federalist
Hopefully that's enough to get you going, and at the very least, enough to give pause to buying into any hint of a belief that the people telling you the latest Trump hoax is legitimate.