A photo was snapped by photographer Tom Brenner of President Trump boarding Air Force One with a twenty- dollar bill sticking out of his back pocket.

The president explained to reporters on Wednesday that he has not “had to use a credit card in a long time,” but instead keeps a wad of cash in his back pockets since he doesn’t carry a wallet.

A reporter asked Trump, “Do you carry cash in your back pocket?”

Trump pulled out wad of cash from his back pocket and answered, “I do! I do!”

“I do like leaving tips to the hotel,” Trump said. “I like to carry a little something. I like to give tips to the hotel. I’m telling you, maybe a president’s not supposed to do it, but I like to leave a tip for the hotel.”

The president returned after midnight Thursday from his trip to the West Coast, where his fundraiser raked in $15 million for his reelection campaign.