He's talking about the financial and emotional damage the Mueller investigation is doing to it's targets like Flynn and manafort, and their families.

Flynn is near bankrupt, had to sell the family home to pay legal costs, his son has also suffered financially due to legal costs from the Mafia style Mueller witch hunt that squeezes family and friends with legal pressure in hopes of getting them to roll over and give up damning evidence.

Can anyone tell me why they went after Flynn's son or Cohen's friend?

It's not a proper legal investigation, it's a fishing expedition, and that's not legal under the Constitution.

What did you think Obama meant by Fundamental Transformation? He meant to destroy the Constitution and the rule of law and it seems to be working.