This chapter considers the restructuring of the federal judiciary during the period of Republican dominance from the inauguration of Rutherford B. Hayes in 1877 to the inauguration of Woodrow Wilson in 1913. It shows that Gilded Age and Progressive Era politicians pursued judicial reform that focused less on the extent of judicial power and more on the structural logic and internal consistency of the institutional judiciary more generally. The chapter discusses the two stages in which judicial institution building occurred during the period: first, the Gilded Age attempt to unburden the Supreme Court by appointing a new slate of judges to staff circuit courts (1877–1891); and second, the Progressive Era unification and synchronization of all laws concerning the judiciary in one statute (1892–1914). The role played by Republicans and Democrats in judicial institution building in the Gilded Age and Progressive Era is also examined.