Final answer:
Single-issue third parties are typically focused on one main issue, lack resources, and do not aim to elect as many members as possible, which is not characteristic of these parties and distinguishes them from the major political parties.
Step-by-step explanation:
Characteristics of Single-Issue Third Parties
Single-issue third parties have specific attributes that differentiate them from the two main political parties in the United States. They often focus on a singular issue or a set of closely related issues that are not being adequately addressed by the major parties.
A characteristic that does not describe single-issue third parties would be that they are formed to ensure as many members of their own party get elected as possible. This is more indicative of broad-based, established parties that have a wide array of policy interests and the organizational structure to support multiple candidate elections.
Moreover, single-issue third parties are typically resource-poor and do not receive equitable media coverage, deeming them less viable in the political arena.
They tend to bring attention to specific issues, like the Green Party with environmental concerns, and can siphon off votes from the major parties, thus impacting election outcomes. While these parties play a crucial role in the democractic process, their focused agenda does not typically include a wide-reaching electoral strategy aimed at placing multiple party members into office.
Lastly, single-issue third parties do not typically engage in the formation of broad coalitions that are necessary to win a majority in elections; instead, they aim to influence public policy by promoting their core issue.