ABC World News Tonight with David Muir Full Broadcast - July 21, 2024

In a special edition of World News Tonight, Mary Bruce and Selina Wang report on Pres. Biden’s historic decision to withdraw from the 2024 election; Jon Karl has details on Vice Pres. Kamala Harris’ efforts to shore up support for the Democratic nomination; Rachel Scott has Donald Trump’s response to Biden’s exit; Rick Klein and Martha Raddatz report on the fallout after Biden upended the race for the White House; and more on tonight’s broadcast of World News Tonight with David Muir.