The 10th amendment has been routinely ignored since the days of John Marshall, Chief Justice of SCOTUS. Politicians on both sides of the political spectrum have completely caved in to the idea that the federal government must be the be-all, end-all.
The individual states have been relegated to the back pages of history, for all intents and purposes.
And, unfortunately, the electorate has bought into the myth.
Witness: how much energy is put into presidential campaigns as if the president is the beginning of all things policy wise. We need only consult the preisdent for matters of war and foreign policy. General and chief ambassador.
If we--as conservatives--focused more on congressional races ala Newt's Contract with America, we would be putting the focus back on legislature...particularly as it impacts each state. As long as we keep fighting over the WH we support the myth. Focus on the states and the temperment we want for a POTUS will naturally follow suit.