xkcd #2969: Vice President First Names
alt text:
[Political pundit on the ScrabbleTV News channel] "After four years of defying orthographic pressure, Joe ceded the top of the ticket to Kamala, who--after considering Josh, Mark, Andy, Roy, and Pete--picked Tim."
explanation: https://explainxkcd.com/wiki/index.php/2969:_Vice_President_First_Names
JD is an abbreviation though. When you use his full name, Jiminy Dipshit, it's longer than 4 letters.
Jizzy Daybed
Jorkin Dapeanus
It's almost like they go by a shortened nickname so it's easier to remember for the voters.