Insightful videos by Peter Doocy raise questions about Joe Biden's mental acuity and media's reluctance to address his health concerns.

While House Republicans and Trump appear to be aligned in their desire to investigate Biden’s fitness to serve, there is some frustration brewing among congressional committees about how quickly the Trump administration is responding to some of their requests, according to multiple GOP congressional sources familiar with the matter.

Democratic Delaware Sen. Chris Coons struggled on Fox News Wednesday to defend his past confidence in former President Joe Biden’s mental acuity as he dodged direct questions about whether he regrets misleading the public.

In a copy of “Original Sin” obtained by ABC News, journalists Jake Tapper and Alex Thompson allege Joe Biden hid info about his son Beau's cancer diagnosis.

A former spokesperson for Joe Biden and Kamala Harris is helping handle PR questions about the new book by Jake Tapper and Alex Thompson about Biden's mental decline.

Biden was treated for a blood clot in his lung in 1988, per The Washington Post. The clot came one month after the then-senator underwent emergency surgery for the first aneurysm. At the time, bed rest following the surgery was thought to have led to the subsequent clot.

After a stretch of limited public appearances since leaving office, former President Joe Biden’s cancer diagnosis arrived amid heightened scrutiny of his cognitive health.

Tapper told Kelly he felt “tremendous humility” about his past coverage of former President Joe Biden’s mental acuity.