Welcome to my stomping grounds. And thank you for working the polls.
As far as in Thornton, or close to Thornton (I'm assuming you will have limited time for breakfast and lunch), there isn't very much at all. Gabes in Glenwood has a nice breakfast and I have friends who enjoy Boz's hot dogs. Since I eat about one hot dog per year, I'm probably not the person to ask about that.
Drive up to Halsted and Ridge, and you will find a number of chain restaurants, including fast food. Panda Express, Chili's, Applebees, Arbys, KFC and Subway can all be found near that corner. Drive a few blocks south and you will find Popeye's, Wendy's Burger King, White Castle and Culvers (Culver's is actually on 183rd St.).
After the polls close you might want to head to Glenwood Oaks, which is old school dining at its best. Their specialty is ribs. While I think the ribs are good, they are not the best I've ever had and are more the "falling off the bone" type. The original (and best) Aurelio's pizza is in Homewood -- just drive up Ridge until you see the train tracks and turn left. You can't miss it. It's on the right hand side. Or look over to the left hand side and go to Bamboo Blue, which is more of an upscale place with asian-inspired food. I particularly recommend their Korean beef wrap sandwich. In fact, the last time I had surgery I made my husband order one for me and run to get it while I was under the knife. It was waiting for me when I got wheeled back to my room. And yes, I realize there is something inherently wrong with ordering food before being wheeled down to surgery, but they hadn't let me eat anything all day and I was hungry, dammit. Also quite delicious is the pork tenderloin with chili mashed potatoes. They have a nice bar selection and several television sets in the bar area so you can watch the election returns there.
If none of the above suggestions appeals to you, I'm making a beef barley casserole for tomorrow's dinner.
Suzy
" There is more stupidity than hydrogen in the universe, and it has a longer shelf life."
- Frank Zappa