In 1929, Congress passed a law capping the US House of Representatives at 435 seats, delegating the power to reapportion to the Executive Branch, and empowering state legislatures to redistrict with few federal limitations. The 1929 law was a compromise after nearly ten years of squabbling over how to apportion pursuant to the 1920 Census. In this article, we consider the apportionment debates of the 1920s both to better understand the politics of the era and to draw lessons that might apply to a potential reapportionment debate today. Throughout the decade, partisanship and political self-interest structured members’ votes on reapportionment. The legislation that eventually passed resulted from a compromise that greatly empowered state legislatures to redistrict freely by removing federal requirements that had been in effect since the 1870s, effectively shifting the battle over congressional representation from one over reapportionment in Congress to one over redistricting in the states.