Okay so he most definitely can, but that wasn’t the case recently when Mr. President and his wife Michelle were in New York. He tried to pay for dinner with his credit card, but it was declined. Apparently, the cause was because he uses it so infrequently that the credit card company must have thought there was some sort of fraud going on.
As he said in the video, good thing the First Lady had hers.
I guess the President is more like us regular folk than we thought.
Picture courtesy of Wikipedia.org