It's always been the worst kind of gaslighting/partisan talking points. Mueller's team had access to them despite the hype, not to mention the CIA, FBI, and DOJ while they were investigating candidate Trump with both criminal and counterintelligence investigations. If they had found anything in those records, even a misplaced comma, it would have been leaked and headline news. Not to mention if they had even a hint of a possibility that he was being paid off in those records, by Russia or anyone, they never would have let him appoint not one, not two, but now three justices.
The way I look at this issue now is that it's an IQ litmus test. Anyone who is still pushing this talking point is either rocking a sub 50 IQ or is on the DNC payroll.