Mike Richards strategized for years to become the host of an iconic TV game show. But he lasted as the host of “Jeopardy!” for just one taping day. The producer-turned-host who positioned himself as Alex Trebek’s rightful heir said Friday he has “stepped down,” citing the controversy over “past incidents and comments.” The stunning announcement came two days after The Ringer website exposed a litany of offensive comments in Richards’ past.

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