Why were you registered as an Independent in the 90s when you claimed that you were always a Republican?

If the Republican Party was so important to you, why were you not a part of it?

Romney: “I was a Republican through and through. My dad ran for President. I was in the Republican club in college. I am a Republican and always have been.“

Source: http://www.star-telegram.com/national_news/story/377386.html