Possible Clues:

• Encourage moderate transport for the young
• Constrain president to provide transport for the young
• Urge president to provide transport for youngster
• American on horse by church taking couple round in buggy
• Baby mover
• Baby transport
• Promote president to pram
• Reportedly pedal president's buggy
• Backing up there's silence, with a church air that moves a child
• Couple possessed of such wild happiness initially will require this conveyance