Political parties like the GOP and DP ought to be illegal, and treated as the amoral conspiracies that they actually are.
Once a single party is allowed to exist, other conspiracies must form, because of the simple mathematics of many against one. But a two party system can be far worse than a single party one.
In a two party system, whenever one party is in power, the other will do everything they can to sabotage any effort of the government to improve the lot of the common man. They don’t want their opponents to get credit for doing good, so they will do their crooked best to find a way prevent it from happening.
All obstructions to the execution of the Laws, all combinations and associations, under whatever plausible character, with the real design to direct, control, counteract, or awe the regular deliberation and action of the constituted authorities, are destructive of this fundamental principle, and of fatal tendency. They serve to organize faction, to give it an artificial and extraordinary force; to put, in the place of the delegated will of the nation, the will of a party, often a small but artful and enterprising minority of the community; and, according to the alternate triumphs of different parties, to make the public administration the mirror of the ill-concerted and incongruous projects of faction, rather than the organ of consistent and wholesome plans digested by common counsels, and modified by mutual interests.
However combinations or associations of the above description may now and then answer popular ends, they are likely, in the course of time and things, to become potent engines, by which cunning, ambitious, and unprincipled men will be enabled to subvert the power of the people, and to usurp for themselves the reins of government; destroying afterwards the very engines, which have lifted them to unjust dominion.