Based on your knowledge why are partisanship and a two party system significant parts of us politics

Because there are only two major parties, US citizens feel that they only have a choice between one party or the other.

Because there are only two major parties, the parties tend to disagree greatly on many issues, taking either one extreme side of the argument or the other.

At times, there have been attempts to create a viable third party, but these parties rarely have enough support to be on an equal footing with the two main parties.

although world war i began in 1914, the united states did not join the war until 1917. the additional firepower, resources, and soldiers of the u.s. to tip the balance of the war in favor of the allies. remaining neutral. when war broke out in 1914, the united states had a policy of neutrality.