Mayor Bill de Blasio says he won't reimburse the taxpayers for personal trips when his security detail is at the wheel, even though New York City's other top elected officials have said they would. For the first time Monday afternoon, Mr. de Blasio addressed criticism from government watchdogs and former elected officials who have questioned his ethics for allowing the public to fund out-of-town private travel, an issue raised in report published last week in The Wall Street Journal. Mr. de Blasio, a Democrat, said he would abide by a March 2009 advisory opinion from the city's Conflicts of Interest...