Answer is - The French Revolution
The US Constitution is silent about the subject of political parties. The founding fathers did not want American politics to be partisan. George Washington, the first President of the US was not a member of any political party.
Political parties were formed in the 1790s. The Federalists were in favour of Britain because it had political stability and close ties with the American trade. While the Republicans were in favour of the French and the French Revolution.
The election held in 1796 was the first election in American history in which political candidates at the national, state and local level began to run for office as members of organized political parties. The parties upheld strongly opposed political principles.
