Today, the TARDIS definitely was not there.
The Oval Office of the White House hadn't changed all that much over the decades of the 21st century. There were different paintings hung on the walls, the occasional adjustment to the carpeting and improvements made to the security systems, but otherwise it looked like it usually did.
The Doctor stepped out of the TARDIS and closed the door behind him with his usual casualness. The difference between this stop and at least 80% of his other stops was that when he turned around after pocketing his key, the room was full of secret service agents pointing guns at him. Usually it was other people pointing guns at him.
"Hello!" he said, greeting them all with his standard amount of cheer. "I'm the Doctor. I'm here to see the President."