What is true about the rumors I have seen that Mitch the Senator has been given billions/millions in campaign funds filtered from Russian plutocrats?
Here’s what politifact says about this story. To quote the bottom line:
A post says McConnell’s “biggest donor” is a Russian oligarch who was released from U.S. sanctions.
Blavatnik is involved in Deripaska’s businesses, on which sanctions were lifted recently, but it is inaccurate to call him the Russian oligarch “that the GOP just lifted sanctions on.”
Blavatnik also donated money to McConnell’s Senate Leadership Fund, but he wasn’t the highest donor, records show. He also contributed to other Republican leaders and GOP-affiliated PACs.
So yes, it looks like he has been given quite a bit of money from Russian plutocrats. Some portion of the $7.35 million given to the GOP in 2017 by a Russian oligarch, according to this Dallas News story.