No, Don't Do It!
Apparently, NBC are setting up a US version of Eurovision. Oh dear, oh dear. What on Earth has possessed them?
There must be no better way to spread regionalism in its worst form, and to make music both commercial and political. All you would ever have is states voting for states that they actually like, and never for anyone they don't - so red states are almost certainly never going to vote for blue states, or vice versa. What we always end up with in Europe is most nations only voting for their next door neighbours, particularly in the Eastern Bloc, so Poland and Latvia do well regardless. Therefore, the state that would win is most likely the state with most neighbours.
Seriously, if I were American, I'd write to NBC begging them not to do this.
Do Americans really want to hear an Oklahoman version of Jemini?