How 'Let's Go Brandon' became code for insulting Joe Biden

When Republican Rep. Bill Posey of Florida ended an Oct. 21 House floor speech with a fist pump and the phrase 'Let’s go, Brandon!' it may have seemed cryptic and weird to many who were listening. But the phrase was already growing in right-wing circles, and now the seemingly upbeat sentiment -- actually a stand-in for swearing at Joe Biden -- is everywhere.