They just don't advertise it.
Or, they really aren't meaning to use it like a blog, but it seems to have been around since last November, just nobody noticed it. It is called Out of the Blue, and it seems to be a basic install of Word Press onto the wa-democrats.org site.
Comments are turned off, but it certainly seems like someone is intending on building some sort of blog.
This is ironic given Ken's suggestion last month.
I found it by following the link for the site's RSS feed from the front page. So, they could just be using the Wordpress install to produce an RSS feed, which wouldn't be that bad of an idea. But, if they did want to transition Out of the Blue into a real deal blog, they could.