Biden announces 2024 re-election bid amidst Trump challenge.

President Joe Biden announced his re-election bid with a promise to protect American liberties from "extremists" linked to former President Donald Trump, who he beat in 2020 and might face again in 2024. Biden described Republican platforms as threats to American freedoms, vowed to fight efforts to limit women's healthcare, cut Social Security and ban books, and blasted "MAGA extremists." Trump, who is the early frontrunner in the Republican primary race, criticized Biden over his record on immigration, inflation, and the chaotic U.S. pullout from Afghanistan in 2021.