Prominent Biden loyalists who have suggested he should step down

• After a disastrous debate, many once loyal Democrats are calling on the president to drop out.
• Former Obama aides and popular commentators fear Biden affirmed fears about his age.
• The DNC isn't until August, meaning there's time to choose a new nominee.

For months, Democrats have rallied behind President Joe Biden, insisting that in private moments he's energetic and up for the job. But after the president's abysmal performance last week, some are changing their tune — and the new melody is somber.