Steve Cohen actually said...
When you complain, and complain, and complain, and then you have an opportunity to put your story to the American public and you don't want to do it, and you don't want to be subject to cross examination yourself, it shows you don't have a very good story and a very good defense.
Context
Steve Cohen critiques the Trump administration's refusal to participate in the impeachment hearing, suggesting it indicates a weak defense.
11/26/2019