Candidates would have to grub for tens of millions of dollars in extra cash to run a new campaign, and the cumulative additional costs to local election administrators would be vast. And voter turnout easily could drop in the decisive runoff. Instead, the Constitution should permit other mechanisms, such as instant-runoff voting, a more efficient and inexpensive method used in several nations. Any candidate with a majority of first choices is the winner. If there is no winner, the weakest candidates are eliminated, and a second round of counting takes place.
Rounds continue until there is a majority winner.
Ballot machines can handle this quickly and efficiently. Let's send a message to American voters that it is their votes, and their votes alone, that count when electing our leaders.