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Mayor Bill de Blasio has not always had the best luck with his travels out of town.

There was the trip to Germany in July 2017, when the mayor joined protest events around the Group of 20 meeting in Hamburg. The trip’s timing — a day after the ambush killing of a city police officer in the Bronx — brought him heavy criticism.

In February, Mr. de Blasio had to cancel a trip to New Hampshire, an early primary state, when a New York Police Department detective was killed in the line of duty.

And in 2015, Mr. de Blasio was just returning from a trip to the Vatican when the city reversed itself on a highly watched decision to place a cap on the number of for-hire vehicles. The move was seen by some as a cave-in to Uber, which had launched an aggressive campaign targeting the mayor.