How can a strong third-party candidate impact the two-party system in the united states?

A strong third-party candidate can upend the traditional two-party system in a number of ways.

The most important is that it will likely draw candidates from one of the candidates from the two major parties.

This means that a third-party candidate, in the United States, is unlikely to win and is more likely to be seen as a "spoiler" candidate for one of the two major party candidates.

This was seen with Ralph Nader in the 2000 election and Ross Perot in the 1992 election.

Third party candidates can also upend the discussion as it will force the two major party candidates to fight (and pander for the votes that the third party candidate is attracting.

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the federal government of the united states was established by the constitution. us is a presidential republic. the president is head of state, head of government and of a two party legislative and electoral system. the supreme court balances the powers of the federal and the state government. yhe executive branch is headed by the oresident. there are two chambers of congress, the senate and the house of representatives. judicial power is exercised by the judicial branch (or judiciary), comprised of the supreme court and lower federal courts. the judiciary's function is to interpret the   constitution as well as the federal laws and regulations.