Their exchange via DailyMail: At Primanti's, where the president went in to get take-out, he motioned to diners when asked if his economic message was resonating with voters.

'Well, we'll find out. You'll have to ask these folks right here,' Biden said.

One diner piped up, 'Don't ask us!'

As the president left one diner asked the reporters in the room, 'Why didn't you ask about the border.'

'All these guys want to do is eat their lunch,' Biden said, putting his hand on one male diner's shoulder as he exited the establishment.

Primanti's sandwiches are a Pittsburgh staple, served with a layer of coleslaw and French fries stuffed between giant pieces of bread.

Biden ordered the 'Pitts-burger' - beef patty, lettuce, tomato, slaw and fries - and tipped $40, the White House said.