Ending foreign oil dependency: Does America have the gumption?

Fine here, but not on the highway?

A while back President Bush told U.S. automakers to start making more relevant vehicles, much to the chagrin of the auto industry. Then Barack Obama echoed much of that same sentiment, and now John Edwards has called on Americans to give up their SUVs.

Are Americans ready for such a change?

While hybrid cars, clean diesel vehicles and biofuels offer the future much cleaner vehicles, it will take years before such new technologies can cost-effectively replace conventional vehicles - at least in the short term thinking of American consumers.

Downsizing could have a much more immediate impact. And, coupled with new technologies, downsizing might just put the end of foreign oil dependency in America's sights.

Still, can such talk lead to the White House or does it doom a campaign?