I think you are wrong to bring politics into this, especially the left-right divide. The question of whether the unemployment rate is meaningful and useful is a question of economics, and should be settled as such. In fact, it is being used exactly as it is meant to, consistent with its historical use. Like I said in the other comment, since the other measures of underemployment show similar results, that makes it that much more likely that the unemployment rate is reliable.

Also, please don't throw trolling accusations like that.