Congressional tenure is longer now than in earlier times, but it is la
rgely a myth that the era of the professional politician is a modern p
henomenon. Here, tenure is compared between the 57th and 86th Congress
es. Tenure is linked to a simple median voter model. Increased tenure
is associated with an increased ability to transfer government expendi
tures to the political unit. The increased size of government at the t
ime of the 86th Congress compared to the 57th Congress, largely explai
ns the greater length of time in office. The higher tenure of southern
legislators is linked to lower per capita incomes.