As soon as today's elections are over, the country will turn towards the 2014 races, where a major theme will continue to be the Republican Party's demographics problem: It's strong in parts of the country that don't have a lot of people, and weak with Hispanics, whose numbers having been growing fast.

The Applied Population Laboratory at the University of Wisconsin recently produced a cool, interactive migration map that highlights these changes and other patterns of movement in the United States. The map color codes counties according to whether people are moving into them (dark purple) or out of them (dark orange). It also includes options to filter migration data by decade, race, age, and, state.

This first graphic shows migration patterns for all people in the U.S. during the 2000s. It shows the abandonment of the Midwest and the Rust Belt, and population surges in places like Nevada, Arizona, Florida, and northern Virginia.

This next map shows migration patterns for Hispanics during the 2000s. Just about the entire country is dyed dark purple (to indicate the highest migration rate), with some interesting exceptions along the Texas-Mexico border.

And this last map shows migration patterns in Massachusetts for the 2000s, where business has been best on Martha's Vineyard.

You can play around with the migration map here.