How many tums can the president run in us?

There's no limit on the number of times a person can run for president, though they're limited to how many times they're allowed to serve as president (two full terms). If a vice-president becomes president, it's considered a full term if they were president for more than two years and not counted if they were president for less than two years. So the maximum length of time someone could be president under current law is 10 years.