(CNN) Analysts will pore over Michael Cohen's public testimony Wednesday before Congress to determine the peril Donald Trump may face in the event of legal or impeachment proceedings. The American people will also be judging Trump's character. Based on an opening statement leaked Tuesday night, Cohen will confirm evidence that has been accumulating for decades that his former boss -- our current President -- is a con man, a racist and a cheat.

Trump's racism was always plain to see, from his birther attacks on Barack Obama's citizenship to his derision of black athletes and African and Caribbean countries. He has spoken of his many corporate bankruptcies with pride, suggesting they were shrewd business tactics. And his disgusting treatment of women, including those he married, stands as proof that he is as indecent a man as Cohen says.

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Few people besides Cohen seem better positioned to testify to the content of the President's character. His children have, of course, known him longer. His wives -- and other women -- know him more intimately. But only Cohen worked across all aspects of the Trump business while also handling sordid issues, such as payoffs to silence women alleging they had sex with a married Trump (Trump denies this). Only Cohen would be entrusted in this way. Only he would be expected to keep it all secret.

As an employee and confidant, Cohen exhibited the main trait Trump always said he valued: loyalty in the extreme. It was Cohen, not Donald Trump Jr., who said he would "take a bullet" for the boss.

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