The pressure is building on President Joe Biden to give up his reelection campaign and step aside for another Democrat who has a better chance of beating Donald Trump in November.

The Democratic dam seems to be breaking wide open on this issue ... as even former president Barack Obama is reportedly encouraging Biden to step aside.

KNX chief correspondent Charles Feldman checked in with Sacramento-area Democratic Congressman Ami Bera ... who also happens to be a long-serving medical doctor.  He asked the Congressman ... and doctor ... for his assessments of both President Biden's political future ... and his health.

Add Jamie Raskin to the list of prominent Democrats calling on President Biden to end his campaign ... Raskin, a Maryland Congressman who was the managing Democrat for the second impeachment of Donald Trump ... just released a public letter asking Biden to step aside.