Why did the framers of the constitution why not expect political parties?

Kelly, They believed that parties, factions as they called them, would be bad for republican self government because people could become more loyal to their party than the country and more concerned for the party's power than the good of the common weal. Michael Montagne Per the previous comment, the founding fathers knew that factions would naturally develop. See federalist paper #10. Madison describes faction as "...a number of citizens, whether amounting to a majority or a minority of the whole, who are united and actuated by some common impulse of passion, or of interest, adversed to the rights of other citizens, or to the permanent and aggregate interests of the community." Madison also said, "There are again two methods of removing the causes of faction: the one, by destroying the liberty which is essential to its existence; the other, by giving to every citizen the same opinions, the same passions, and the same interests." Because neither of these are possible factions must exist. However, the way to maintain a balance of power is through a "multiplicity of faction." If they are all fighting for the same power, factions will give a little to gain a little. If the founding fathers established political parties, they would grow in power too rapidly to control and before you knew it the government would become an oligarchy - rule of the few, and/or tyrannical.