Bost, along with other candidates, initiated the legal challenge against the Illinois law that permits election officials to count mail-in ballots arriving up to two weeks after Election Day, provided they are postmarked by Election Day. Many states have enacted similar laws that provide a grace period for the return of mail ballots to accommodate potential postal service delays or other unforeseen issues.

Chief Justice John Roberts authored the majority opinion, asserting that "candidates have a concrete" interest in the laws governing elections and therefore the right to challenge them. The ruling clarifies the criteria for candidates to bring legal challenges related to election procedures.

The case specifically addressed the question of whether candidates are directly harmed by election laws to the extent that they have the right to sue. The Supreme Court's decision establishes that candidates do have such standing, allowing them to bring challenges before elections take place, rather than waiting for the results to be determined.

The ruling's impact could be far-reaching, potentially opening the door for candidates to challenge a wider range of election laws across the country. This could include laws related to voter identification, registration requirements, and other aspects of election administration. The dissenting justices' arguments and the specific details of the Illinois law were not immediately available. The implications of this ruling on future election-related litigation are expected to be significant.