Jake Tapper’s new book, “Original Sin: President Biden’s Decline, Its Cover-Up, and His Disastrous Choice to Run Again,” co-authored with Axios reporter Alex Thompson, has sparked a conversation about the ex-president’s cognitive decline while in the White House.

But the book’s release, along with Tapper and Thompson’s extensive media tour to promote it in the last month, has not helped the CNN star’s ratings — or the shows that follow his.

In fact, viewership for “The Lead with Jake Tapper” suffered a noticeable year-over-year drop-off in May, posting its worst month since August 2015, according to Nielsen. And the three shows that follow his — “Erin Burnett Upfront,” “Anderson Cooper 360” and “The Source With Kaitlan Collins” — all took significant hits as well, with each seeing its

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