The constant eroding of the State's sovereignty and the consolidation of power into the Federal Government's hands make this somewhat more troubling in the future however. Especially as we move towards more pure democratic systems and away from representative republicism. See for instance the National Popular Vote Compact: http://en.wikipedia.org/wiki/National_Popular_Vote_Interstat...
A similar compact for approving amendments could be an issue for instance.
I'm curious as to how making the presidential election decided by popular national vote has an effect of "eroding State's sovereignty"? As I see it, a national election decided by a national vote is the most natural thing in the world. The only effect of arcane (and frankly, absurd) electoral college system is to put disproportionate power in the hand of some of the states at the expense of other states.
The electoral college (and similarly, the now defunct election of US senators by state legislatures) only seems unnatural in the context of what states have become. They're no longer sovereign states with a central federal government that takes care of a very important but limited set of things. They're now closer to administrative districts in many respects.
edit: I mixed up my EU facts below. The European Parliament is filled by direct election. It's the Council that is elected by the executive branches of member states, and is thus more analogous to the US Senate before switching to direct election. The EU is complicated for my American brain to keep straight! I still might have some of this wrong.
Compare the electoral college to the European Parliamentary elections, which are decided not by all EU citizens but by the Council, or the President of the European Convention, who is elected by the European Parliament.
I'm not sure the relevance of the link.. I never said cigars were healthier.. certainly there are risks involved. But there's a huge gulf between a pack a day habit and a couple day a month indulgence.