Washington continues to advance his idea of the dangers of sectionalism and expands his warning to include the dangers of political parties to the government and country as a whole. His warnings took on added significance with the recent creation of the Democratic-Republican Party by Jefferson, to oppose Hamilton’s Federalist Party, which had been created a year earlier in 1791, which in many ways promoted the interest of certain regions and groups of Americans over others. … While Washington accepts the fact that it is natural for people to organize and operate within groups like political parties, he also argues that every government has recognized political parties as an enemy and has sought to repress them because of their tendency to seek more power than other groups and take revenge on political opponents. He argues that these parties’ efforts to seize power and exact revenge upon their opponents have led to horrible atrocities and will ultimately end in despotism as people throw their support behind the most powerful faction and the faction focuses on increasing their own power instead of promoting the public liberty. Washington goes on to acknowledge the fact that parties are sometimes beneficial in promoting liberty in monarchies, but argues that political parties must be restrained in a popularly elected government because of their tendency to distract the government from their duties, create unfounded jealousies amongst groups and regions, raise false alarms amongst the people, promote riots and insurrection, and provide foreign nations and interests access to the government where they can impose their will upon the country.
You can read what George Washington wrote, in his own words, here. I’m sure that he’s spinning in his grave right now.