1.   A surprise presidential visit to buck up the troops.

2.   And a presidential visit last year, in which Clinton addressed Parliament and was greeted by adoring crowds in Belfast, repaired much of the frayed feelings.

3.   An White House national security officer told how she was pressured by top party officials to approve a presidential visit for a large donor.

4.   And some people are not blase about the presidential visit.

5.   And yet, presidential visits are only the visible tip of the enormous working-level activity such engagement spawns between countries.

6.   As a matter of practice, Secret Service agents preview prospective sites of presidential visits well in advance of the actual visit.

7.   As relatively small communities that rarely receive presidential visits, they were more likely to respond to the appeals of advance staff for big crowds.

8.   As with any presidential visit, not everyone was welcoming.

9.   A presidential visit is never quite routine, even in New York, which fancies itself the most imperturbable city on earth.

10.   After analyzing the situation, the Secret Service agreed to a presidential visit, officials said.