As you know, I went to Wash U.

It's hard to say. Some people before were accusing Wash U. of waitlisting some people to inflate its admissions numbers. Most likely, you will be admitted if you appeal it. They have pegged you as someone who would be a great student there but will most likely attend elsewhere. So they waitlisted you instead of admitting you directly.

Personally, I hate US news and world report and the games that colleges play nowadays. But I have 15 years before my daughter will be applying.