Printing Weirdness

I’m experiencing some printing weirdness. My sidebar is being printed under the main body of text instead of beside it. Which would be a frustration to environmentally-impassioned folks. I’d prefer the sidebar didn’t print at all, but if I don’t have that choice at least I’d like it to print like it appears on the web.

View my page and do a print preview: https://socialcomment.org/about