A caucus is a group of members of the United States Congress that meets to pursue common legislative objectives — kind of like a club. There is a Hockey Caucus, a Toy Caucus, and a Travel & Tourism Caucus — just to name a few. Many are obvious in their purpose and relevance: like the Prescription Drug Abuse Caucus. Some are groups of like-minded lawmakers without a singular focus: like the House Freedom Caucus.

But then there are the others, like those listed here, that take a little head-scratching to understand!

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