A special edition of World News Tonight, breaking news, President Biden announces he will not run for re-election,

the historic decision upending the race for the White House.

President Biden addressing his fellow Americans on social media,

saying, I believe it is in the best interest of my party

and the country for me to stand down,

24 days after his disastrous debate with Donald Trump,

the calls for President Biden to step aside growing louder,

the emotional drama behind the scenes the Biden family Zoom calls and after his decision

the president immediately endorsing vice president Kamala Harris she says it is her intention to earn and win this nomination.

Will the party rally behind her or will there be a drawn-out flight?

Donald Trump and his campaign already pivoting to target Vice President Harris.

The Democratic National Convention just 29 days away,

107 days until the general election, A special edition of World News Tonight starts now.

From ABC News, World Headquarters in New York.

This is World News Tonight, with David New York.

Good evening and it's great to have you with us on this Sunday for a special edition of World News tonight.

I'm Rachel Scott in for David.

We begin tonight with the President's historic announcement writing a letter to my fellow Americans

posted on social and media, saying although it has been the greatest honor of my life to serve as your president

I believe it's in the best interest of my party and the country for me to stand down

it comes of course 24 days after that difficult debate

sparking concerns about his mental sharpness and his age

...