WATCH: Trump previews new White House helipad

At times, the president sounded almost like a construction manager, singing the praises of granite over asphalt in painstaking detail and noting for reporters he brought out for the show that the stone could withstand 35,000 pounds per square inch of pressure.

At times, the president sounded almost like a construction manager, singing the praises of granite over asphalt in painstaking detail and noting for reporters he brought out for the show that the stone could withstand 35,000 pounds per square inch of pressure.