But he wasn’t allowed to serve his full 4 year term. They have to allow him to serve his full 4 year term. They can’t say, “Oh, we’re sorry, we screwed up and got caught cheating, too bad now you only get two years.” That would never happen. Laws would be amended to satisfy the 10 year limit.
So? Nixon wasn't allowed to complete his second term. Even if he wanted to he wouldn't have been run again.
They have to allow him to serve his full 4 year term.
They have to follow the Constitution.