Which minor parties role in the 2000 presidential election contributed to the defeat of the democratic party candidate?

Green party.

Explanation:

Ralph Nader ran in the 2000 United States presidential election as the nominee of the Green Party. Some analysts have stated that Nader acted as a third-party spoiler, making Al Gore lose the election.

The spoiler effect is the outcome of a vote split between candidates with similar ideologies. One spoiler candidate's appearance in an election attracts votes from a major candidate with alike politics.

However, some studies pointed out that the amount of Democrats who voted Republican surpassed those who voted Green, and Nader himself argued the call of being a spoiler.

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