CNN’s Jake Tapper is reflecting on what he could’ve done differently with his coverage of former President Joe Biden — and how it led him to switch up his coverage of President Donald Trump’s second term in the White House.

Appearing on Monday’s episode of the “Pod Save America” podcast, Tapper, who co-wrote the book “Original Sin” alongside Axios’ Alex Thompson, admitted that they “didn’t ask as many questions” about Biden’s reported cognitive decline as they could have.

In the book, which was released in May, Tapper and Thompson claimed to uncover details about Biden aides’ efforts to hide the politician’s ailing health from the public. In May, Biden was also diagnosed with prostate cancer. He is currently undergoing radiation therapy and hormone treatment.

The topic arose after host and former President Barack Obama spokesperson Tommy Vietor asked Tapper, “How do you think the media is handling these growing instances of Trump falling asleep in meetings or maybe seeming like he’s losing a step? Like, when is it a critical mass that it becomes book-worthy?”

“It’s a great question,” Tapper responded before saying of Trump’s health and cognitive state, “We cover it all the time on my show, all the time.”