I overheard a very small snippet of a conversation. Let's all speculate on the missing context

"... yeah that's not the left you know the US republicans ended slavery not the democrats..."

I was driving a scissor lift and don't know anyone involved in the conversation or I'd likely have asked.

Someone tell me this is a quote from the hot new TV show pluribus or something because that small set of words had me off my game all day.

Like what could he have been saying 'thats not the left' about? America didn't end slavery? We don't even live there?