Mitt Romney and Rep. Paul RyanPaul Davis RyanRepublicans are strongly positioned to win Congress in November Don't let them fool you — Republicans love regulation, too Senate harassment bill runs into opposition from House MORE (R-Wis.) grabbed lunch together at Wendy's after visiting a Cleveland campaign office. 

The Election Day stops in Cleveland and Pittsburgh by Romney come after a grueling campaign that has worn out both sides.

"I'm running on empty," GOP vice presidential nominee Ryan admitted to reporters.

Both campaigns have been sprinting through swing states over the last few days, with Romney, Ryan, President Obama and Vice President Biden typically packing in multiple stops each day, often in multiple states. 

As Romney and Ryan circled through the Cleveland suburbs, Biden chowed down at the Landmark Restaurant, a Greek diner about 10 miles away. Biden's trip to the crucial swing state was previously unannounced, a sign of the serious effort both campaigns are making to win Ohio.

Romney and Ryan flew in on separate charter flights Tuesday morning after lodging their votes in Massachusetts and Wisconsin, respectively. 

Ryan greeted Romney aboard the presidential nominee's plane before the pair took off toward the campaign office located in a shopping center in Richmond Heights, a Cleveland suburb. According to a pool report, Ryan earned loud cheers from the Romney campaign staff upon entering the plane.

The pair greeted and thanked volunteers at the office before going to lunch, a campaign aide said. 

Romney ordered a hamburger, chili and Frosty, while Ryan went with a quarter-pounder combo meal, according to the pool report. And it appeared the candidates needed the chance to refuel after their hectic campaign schedule.

The Republican presidential candidate has made a habit out of hitting burger joints on the trail — Romney repeatedly visited BurgerFi in Delray Beach, Fla., before the final presidential debate, and occasionally distributed McDonald's sandwiches to the press corps traveling on his plane.

The Romney campaign has not announced if Romney and Ryan will make any additional stops before heading back to the airport, with Romney heading to a campaign event in Pittsburgh and Ryan heading to Richmond before returning to Boston to watch the election returns come in.