It's not "changing demographics". It's vote fraud, plain and simple.
Don't buy what the media is selling.
It's pretty obvious that the Democrats cheated six ways from Sunday in Wisconsin. Scott Walker stomped Barrett in June; 5 months later Romney stomped Scott Walker's vote totals.
Strangely, Obama in turn stomped Romney's vote totals. Romney's totals were around Walker's totals, averaging 5-10% higher. Obama's totals averaged 40-50% higher than Barrett's in every county. GOTF.
I'll believe it when they go Right To Work!