Challenges of Substituting Presidential Candidates

Each state in the US has varying rules for substituting presidential candidates, which can lead to legal challenges. If Biden were to drop out before the Democratic National Convention, the nominee chosen at the convention would proceed in most states. However, some states have statutes that could pose legal hurdles if Biden dropped out pre-election, potentially leading to widespread litigation. Ambiguities in decades-old laws and the unconventional election climate could result in legal battles across states.