evidence: President Joe Biden’s stunning decision to drop out of the 2024 race did not have to do with any medical issues, a senior White House official told CNN. [...] The news that Biden is stepping aside from the 2024 campaign is coming as a surprise in real time to many rank-and-file Biden staffers — at both the White House and the presidential campaign. CNN has spoken with multiple staffers who found out when the president posted the letter at 1:46 p.m. ET on X. The announcement was kept extremely close hold, one Biden aide said. [...] Read Biden’s full statement announcing he's dropping out of 2024 presidential race