Herb Kohl states the obvious. Perhaps only the fact that he is not running again and would not need to seek telecom campaign contributions permits him to state the obvious. From the WP:

He said that acquisition of T-Mobile — a lower-cost competitor to the three biggest national carriers — would end up costing consumers.

“It will likely tend to substantially lessen competition, lead to consumers paying high prices with fewer choices, as well as lessen the innovation that has been the keystone of this industry in the last decade,” Kohl said in his letter to Attorney General Eric Holder and FCC Chairman Julius Genachowski.