Mayor Johnson hasn't decided whether to seek a second term — and explains why

A day before driving his oldest son to college, an emotional Brandon Johnson said Tuesday he would like to “hold onto this moment for a little while longer” — both as father and as Chicago’s mayor — before deciding whether to seek a second term. Johnson said he allowed unnamed supporters to start circulating his nominating petitions Tuesday, the first day to start gathering the 12,500 signatures needed to get on the ballot. He said he was encouraged by the "number of individuals eager to…