Jar Jar is a dark side user, although he isn’t a Sith. He was banished from his tribe for discovering ancient Sith texts hidden in Naboo’s Sacred Place, and he used the knowledge contained in those texts to obtain vast dark side power. His signature technique was a subtle form of mind control, manifesting through apparent coincidence. When the Queen’s ship made it to Coruscant, Palpatine sensed Jar Jar’s power, and formed an alliance with him. Jar Jar would mind control the Senate into giving Palpatine absolute power, and in return Palpatine would have Jar Jar be one of his top advisors. However, this deal was a ruse, and Palpatine killed Jar Jar soon after the rise of the Empire.

I like more the “Jar Jar is just an idiot” version. I mean, I like him precisely for this reason hahaha 😄