Congress

Was set with the 1910 census during the time before Prohibition, in order to limit the power of the East Coast states. These states were seeing a huge population increase between 1910 and 1920 due to European immigrants, the majority of whom were opposed to Prohibition. So Congress is now stuck in 1910, the result being Congressional districts of vastly different size and, like the Senate, too much power in the hands of rural areas.