Trump was falsely accused of collusion with Russia to rig the 2016 election. Mueller’s investigation turned up no evidence sufficient to indict anyone in Trump’s campaign for legal violations related to such collusion. No collusion was ever shown. The Russian Collusion Conspiracy theory is the most definitively and authoritatively debunked conspiracy theory ever.
But the big point is that Democrats made up the Russian Collusion conspiracy theory, screamed “Not my President”, declared the election stolen, pushed for Electors to be faithless, and a whole lot of other things to overturn the result of the 2016 election. It completely changed me from a lifelong Democrat to seeing the Democrat Party as the major threat to our nation. Cathy Young can whitewash it with ten coats of paint, but to me at the time, the Democrats had set a horrible precedent of attacking our procedures for peaceful transfer of power. By contrast, Republicans filing court cases contesting electoral totals is entirely within their legal rights.