He and Loeffler were running against one another in a runoff for Republican nominee for Senator in the 2020 election...sorry, no it was a Special Election right after the 2020 one. Loeffler ultimately won but lost to Raphael Warnock (really cute campaign ad featuring a supporter's beagle btw which Republicans later attacked him for because it wasn't his own dog.

) Perdue also ran for Governor for Georgia but lost that too. And Loeffler pretty much bought her temporary Senate seat imo. (She was a HUGE Trump donor.)
You'd never guess I live in the UK when I start banging on about American politics.