For more than a decade Michael Cohen worked his way into Donald Trump's inner circle, a loyal attack dog who fought vehemently on behalf of his boss. In return he wanted what any hound desires -- a treat, a pat on the head, or at least a moment in the sun. On Monday the latter was his, though perhaps not as he'd originally envisioned. Cohen took the stand as the star witness in the former president's criminal trial, painstakingly spelling out how he paid an adult film actress hush money at Trump's behest.