What happens if a presidential candidate becomes ill and cannot continue?

If a presidential candidate becomes ill and cannot continue, their party may have provisions in place for replacing them on the ballot. Typically, the party's leadership would select a substitute candidate, which may require approval from party members or delegates. In some cases, if the illness occurs close to the election, legal and logistical challenges may arise regarding ballot changes. Additionally, the candidate's campaign may address the situation through public statements to inform voters and maintain transparency.