What caused the first political parties to form? early leaders were unable to agree on regional and economic differences. differences between pro-war and anti-war leaders. it was president washington's attempt to balance differences. it was a reaction to the those loyal to britain and those against colonial rule.

The one that cause the first political parties to form is the; early leaders were unable to agree on regional and economic differences in which led them to form federalists and anti-federalists because the people has different opinions when in terms of having to have power.

answer; ///i believe the state is (pennsylvania);