Tennessee, which appears to be giving South Carolina a serious run for the title of Wingnut Central, is now at the forefront of one of the tea party's more peculiar pet rocks: repealing the 17th Amendment, by hook or by crook.
Why are they opposed to electing senators? Hard to say. It was a Bircher thing back in the 60s (Robert Welch was apparently convinced that it represented a poisonous concentration of power in the federal government), and now it's a thing again. The names change, but the obsessions just go on and on. There's probably no point in asking why.