https://thefederalist.com/2019/07/24/the-mueller-testimony-was-a-disaster-for-democrats/
If Democrats believed that Robert Mueller would provide them with additional ammunition for an impeachment inquiry, they made an extraordinary miscalculation. Not only was Mueller often flustered and unprepared to talk about his own report—we now have wonder to what extent he was even involved in the day-to-day work of the investigation—but he was needlessly evasive. In the end, he seriously undermined the central case for impeachment of President Donald Trump.
The often-distracted Mueller didn’t seem to know much about anything. The very first Republican to question him, House Judiciary Committee Ranking Member Rep. Doug Collins, forced Mueller to correct his own opening statement. In it, the former FBI director had asserted that the independent counsel “did not address collusion, which is not a legal term.”
Stressing the difference between the criminal conspiracy and the colloquial “collusion” is a popular way of obscuring the fact that the central conspiracy pushed by Democrats, one that plunged the nation into two years of hysterics and fantasy, had been debunked by Mueller. Moreover, as Collins pointed out, Mueller’s own report stated that “collusion” and criminal conspiracy were basically “synonymous.”