1st: Early Presidents (Washington-Jackson) - Stuck closely to formal constitutional powers, worked closely with congress, Elitist, (until Jackson) no precedents.
2nd: COngressional Dominance (Van Buren-Hoover) Not Lincoln or T. Roosevelt. - Congress begins to reassert power. Unified Congress acted quickly on matters - reduced importance of "Chief Legislature" as most 1800 congresses were "veto proof"
3rd Era: Modern Presidents. - Massive expansion of power (Formal and informal) People associate events with president more now. 11 of 13 presidents have made significant change to the office and country. Modern presidents lead, congress follows suit.