The Democratic warhorse rejected criticism that his age and acuity was a factor in the final months of his single term in the White House

Soon after, the ex-president and co-host Ana Navarro -- in a move that looked coordinated coming out of a commercial break -- both made the Sign of the Cross, as Navarro asked him to weigh in on Trump's return to the White House.

The appearances have also allowed Biden to defend his own legacy at a time when Trump frequently blames him by name.