United States presidential primary
There is no provision for the role of political parties in the United States Constitution, since the Founding Fathers did not originally intend for American politics to be partisan. In Federalist Papers No. 9 and No. 10, Alexander Hamilton and James Madison, respectively, wrote specifically about the dangers of domestic political factions. Thus in the first two presidential elections, the Electoral College handled the nominations and elections in 1789 and 1792 that selected George Washington. The beginnings of the American two-party system then emerged from Washington's immediate circle of advisors. Hamilton and Madison, who wrote the aforementioned Federalist Papers against political factions, ended up being the core leaders in this partisanship: Hamilton became the leader of Federalist Party while Madison co-helmed the Democratic-Republican Party with Thomas Jefferson.
Alexander Hamilton
Hamilton recruited John Jay and James Madison to write a series of essays defending the proposed Constitution, now known as "The Federalist Papers", and made the largest contribution to that effort, writing 51 of 85 essays published (Madison wrote 29, Jay only five). Hamilton supervised the entire project, enlisted the participants, wrote the majority of the essays, and oversaw the publication. During the project each person was responsible for their areas of expertise. Jay covered foreign relations, Madison covered the history of republics and confederacies, along with the anatomy of the new government and Hamilton covered the branches of government most pertinent to him: the executive and judicial branches, with some aspects of the Senate, as well as covering military matters and taxation. The papers first appeared in "The Independent Journal" on October 27, 1787.