This was quite the surprise. The Detroit Chamber of Commerce has come out in support of the Detroit River International Crossing [[DRIC):

"We favor the DRIC," said Sarah Hubbard, the Detroit chamber's vice president of governmental relations. "We don't oppose the Ambassador Bridge overtly. And, if they build a second span, we could live with it. But we support the bi-national effort of the DRIC."
Not surprisingly, though, the CofC and Brookings don't really make a convincing case for DRIC, either.