The Great Compromise

At the Constitutional Convention in 1787, big states and small states could not agree on how Congress should represent them. The Virginia Plan, favored by large states, wanted both chambers of the legislature based on population, so Virginia would dominate. The New Jersey Plan, favored by small states, wanted one chamber with equal votes per state, so Delaware would count just as much as Virginia. Neither side would ratify a Constitution that left them outvoted forever.

The Great Compromise, proposed by the Connecticut delegation, fused the two plans into a bicameral Congress. The House of Representatives uses the Virginia Plan's logic: seats are allocated by state population, so bigger states get more seats and more influence over legislation that starts there, including revenue bills. The Senate uses the New Jersey Plan's logic: every state gets exactly 2 seats, no matter how many people live there. This gave small states a guaranteed floor of power they could never be voted below, which is why they agreed to join a union where the House would otherwise swamp them.

This split matters beyond 1787. It means national policy has to clear two different representational logics: the House reflects where people live now, the Senate reflects the fifty states as equal partners. As population shifts over time, small states keep the same 2 senators while their House seats and share of the national population can shrink dramatically, making the Senate an increasingly powerful check for sparsely populated states. This tension between population-based and state-based representation echoes later debates over the Electoral College and federalism generally.