Political factions or parties began to form during the struggle over ratification of the federal Constitution of 1787. Friction between them increased as attention shifted from the creation of a new federal government to the question of how powerful that federal government would be.
-<em>www.loc.gov</em>
Explanation:
The US has a two-party political system because of two structural features in American politics: single-member districts and winner-take-all elections. Both features encourage the existence of 2 major parties, as smaller parties face great difficulty in winning elective office. -<em>Quizletquizlet.com</em>
