That's not a problem for many people in Illinois counties where conventional oil and gas drilling has been going on for over a century.

NPR: Scenic, Struggling S. Illinois Braces For Oil Rush

"Obama continues to maintain a 'home field advantage' in the southern Wisconsin counties that border Illinois, " Holland said.

CNN: Obama gaining in 5 battleground states, polls say

LaHood, 63, has represented 11 counties in central and western Illinois since entering Congress in 1994.

NPR: Solis, Kirk, LaHood Add To Obama's Diverse Team