Cohen's congressional testimony will reveal why Trump is a 'madman' -- and give you 'chills': report
Michael Cohen leaves federal court after a hearing on April 16, 2018, in New York. (Shutterstock)

A person close to former Trump "fixer" Michael Cohen revealed Tuesday that the attorney's congressional testimony will show why the president is crazy.

In an interview with the Wall Street Journal, the Cohen source said that the testimony will allow Donald Trump's former attorney to tell the story of working for him.

“He’s going to tell the story of what it’s like to work for a madman, and why he did it for so long,” the source said. “He’s going to say things that will give you chills.”

The Journal noted that Cohen's testimony is likely to be restricted so as not to interfere with his cooperation with special counsel Robert Mueller's Russia investigation.