What is Swing state?

In American politics, the term swing state refers to any state that could reasonably be won by either the Democratic or Republican candidate in a statewide election, most often referring to presidential elections, by a swing in votes. These states are usually targeted by both major-party campaigns, especially in competitive elections. Meanwhile, the states that regularly lean to a single party are known as safe states, as it is generally assumed that one candidate has a base of support from which they can draw a sufficient share of the electorate without significant investment or effort by their campaign.

Due to the winner-take-all method most states use to determine their presidential electors, candidates often campaign only in competitive states, which is why a select group of states frequently receives a majority of the advertisements and candidate visits. The battlegrounds may change in certain election cycles and may be reflected in overall polling, demographics, and the ideological appeal of the nominees.