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

A sign reading "Let's go Brandon" is displayed on the railing in the first half of an NCAA college football game between Boston College and Syracuse in Syracuse, N.Y., Saturday, Oct. 30, 2021. Critics of President Joe Biden have come up with the cryptic new phrase to insult the Democratic president. (AP Photo/Joshua Bessex)

FILE - Protesters hold signs on the side of the road as seen through the window of a motorcade vehicle traveling with President Joe Biden to the Flatirons Campus of the National Renewable Energy Laboratory, on Sept. 14, 2021, in Arvanda, Colo. (AP Photo/Evan Vucci)

FILE - People protest as the motorcade for President Joe Biden passes by Oct. 5, 2021, in Howell, Mich. (AP Photo/Evan Vucci)

FILE - A resident holds a placard and shouts slogans against President Joe Biden as people wait for his motorcade in the streets of Manville, N.J., Sept. 7, 2021. (AP Photo/Eduardo Munoz Alvarez)

FILE - People protest as the motorcade for President Joe Biden passes by Oct. 5, 2021, in Howell, Mich. (AP Photo/Evan Vucci, File)

FILE - People protest as the motorcade for President Joe Biden passes by Oct. 5, 2021, in Howell, Mich. (AP Photo/Evan Vucci, File)