City officials and the Cubs have had little to say about the march, which will get underway at 4 p.m. Thursday as evening rush hour and, further south, Lollapalooza are beginning. And it will end at Wrigley Field on the same night the Cubs play a home game; asked last week whether he’d back the anti-violence march — as he did a march that shut down the Dan Ryan Expressway — Mayor Rahm Emanuel’s office didn’t directly respond. Ald. Tom Tunney, whose ward includes Wrigley Field and who rarely opposes Emanuel, told the Tribune he wasn’t exactly thrilled the protest was unfolding in his ward. But he’s not standing in the way of it.