Which of the following best describes a "swing state"?

A swing state is best understood as a state where both major political parties, typically the Democratic and Republican parties, have comparable levels of voter support. This characteristic means that the outcome of elections in swing states can be unpredictable, as they can flip between voting for different parties in different election cycles. This competitiveness makes swing states crucial in presidential elections, as they can ultimately decide the overall outcome due to their potential to provide electoral votes to either major party.

In contrast, states with significant majorities for one party often consistently support that party in elections. States that reliably vote for a single party over time or do not participate in elections do not fit the definition of swing states. Swing states are thus pivotal in shaping election strategies and campaign focuses, as candidates prioritize these areas in their efforts to secure votes.