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.
The Federalist Papers
The papers can be broken down by author as well as by topic. At the start of the series, all three authors were contributing; the first twenty papers are broken down as eleven by Hamilton, five by Madison and four by Jay. The rest of the series, however, is dominated by three long segments by a single writer: No. 21 through No. 36 by Hamilton, No. 37 through 58 by Madison, written while Hamilton was in Albany, and No. 65 through the end by Hamilton, published after Madison had left for Virginia.