Running for president is not a job for those with weak metabolism.

Hamburgers. Cheese steaks. Mom 'n pop ice cream. Sodas to wash it all down. Local dessert delicacies you'd be rude to resist.

Here's a 24-hour sample of Wisconsin Gov. Scott Walker's diet on the campaign trail this week:

That's like, a bajillion calories!

There's no way politicians are not going to gain weight with that lifestyle, said Lise Gloede, a Virginia-based nutritionist.

When they're not campaigning with food, they're on the road in the American heartland, which doesn't really have a lot of healthy options, she added.  Plus, eating like the people whose votes they want is a great way to connect.  The sad truth is "Most Americans don't eat healthy," Gloede said.

So, how to navigate the daily food challenges while avoiding appearing aloof and disconnected from the people whose votes you covet?

"Order a small," says Gloede's. Take a few bites. Shake some hands. Get outtta there before another slice of pizza is forced onto you. Take refuge on the bus, where you've deployed an intern to stock it full of water and fruit.

But, even that may not be enough to avoid a bulging waistline. A "small" Coca-Cola used to be about six ounces. Today it's roughly 14 ounces, Gloede said.

So we turned to DC-based trainer Errick McAdams to ask if there's some sort of exercise regime candidates could turn to to burn it all off -- maybe wake up at 5 a.m. and run five miles?

Nope.

"You can't outwork a bad diet," he said.

At a "Politics and Pies" event in Concord, N.H., former Florida governor Jeb Bush had a rare treat: blueberry pie. The presumed Republican presidential candidate generally sticks to snacks on a strict "paleo" diet. (Ed O'Keefe/The Washington Post)

You can mitigate the damage. He suggested candidates avoid the bread or beer at restaurants and try to find at least 30 minutes five or six days a week to get some kind of cardio and resistance training (like weights) to at least burn off the hamburger bun. (Hillary Clinton, her doctor certified on Friday, swims and does yoga.)

And since we were picking on Scott Walker here, it looks like he does make it a habit to rise early to work out:

But none of these tricks, both McAdams and Gloede said, is enough to keep the weight off of someone who will be living a nearly non-stop artery-clogging lifestyle for the next few months (or 15 if you make it to the general election.)

So, watch for it: Unless they're born with Gisele Bundchen-like metabolism, your 2016 presidential candidates will probably be a little heavier when they ask for your vote come November.