There doesn't appear to be a way to embed a campaign list in articles using the normal curly tags. To get around this, I created a campaign list module, then embedded that into my article. For the position, I called it "campaignlist" then at the location where I wanted it to appear in the article I put "{loadposition campaignlist}". You can see the result below:
http://www.hgiexchange.com/exchange-hotel/support
http://www.hgiexchange.com/exchange-hotel/support