Sorry, I'm totally non-partisan, being disgusted by political parties in general. It counts always.
And no, that number does NOT include those over the age of 18 only. The number it is based on is called the "civilian non-institutional population", of which the definition is:
In the United States, the civilian noninstitutional population refers to people 16 years of age and older residing in the 50 States and the District of Columbia who are not inmates of institutions (penal, mental facilities, homes for the aged), and who are not on active duty in the Armed Forces.
The age is 16+, which you can see in the BLS statistics for yourself.
So, it excludes young children, but assumes everyone 16 and older is working, which is a very outdated assumption. Retired doesn't count, unless you're actually in a nursing facility. Military doesn't count. Full-time students don't count. Housewives don't count. Etc.
There are too many caveats to that number for it to be useful as anything other than a misleading, FUD talking point. This article in the WSJ breaks this down nicely.
The real answer is complex, and you can't break it down to a single sound bite. I still maintain the U-6 is a more accurate representation for trying to convey the total unemployment/underemployment picture. I don't think you fall off of U-6 after a set period of time. As it is compiled from a survey, I think you fall off if you flat out say you've just given up looking.
While there are employment issues in the U.S., saying things like "there are 95 million people out of work" just isn't accurate. Most people have a basic understanding that there are approximately 300 million people in the U.S., and the go "OMG! 1/3 of the population is unemployed! Those people need jobs." And that just isn't true.