A more thorough explanation:

Definition: A slate is a list of candidates, typically for political office or a company's board of directors. The list usually includes the same number of candidates as there are positions available for election.

Example: In a local election, there are three open seats on the city council. A political party creates a slate of three candidates to run for those seats. The slate includes one incumbent council member and two newcomers.

Explanation: The slate is a strategic way for the political party to ensure that all three of their candidates have a chance to win a seat on the city council. By creating a slate of three candidates, they are able to present a unified front and increase their chances of success.