Not since 1913 and the 17th amendment. The senate almost made sense when it was the states appointing their senators - now with direct election it is just a grossly biased legislative body where even in the smallest states each senator is meant to represent hundreds of thousands of people that no one can truthfully claim to do.
It's interesting to imply that the US Government should (or does) exist to serve the states instead of the people. The first three words in the US Constitution are "We The People".
For the record, I don't disagree with the existence of an upper house (in Australia we somewhat copied the US Senate design, though territories get fewer representatives than states). But its practical purpose is to facilitate less partisan discussion of legislation (and in Australia we only get that benefit because we have a preferential voting system). And it should be noted that many countries have abolished their upper house and become unicameral, and have continued to function just as well as before[1].
