"Why is he talking on 20/20 about what he doesn't know?"
Well, here's one theory:
"Colin Powell to Run for President? As a Democrat!"
http://www.dvorak.org/blog/essays/powell.html
That is what I see, a presidential campaign about to kick off. A little testing of the waters. However, I doubt he contacted ABC for an interview. They seem to be the movers on this.
he headline sounds worse than the aricle.