Franken, Sprint praise DOJ for opposing AT&T/T-Mobile

Franken also refused to waiver in his opposition despite pressure from organized labor, which supports the deal. Franken praised AT&T for respecting workers' right to organize, but said the promised increase in unionized jobs wouldn't offset the deal's harm to consumers.

“I’ve heard from families across Minnesota that cell phone expenses are an ever-rising percentage of their bills each month, and this merger could make wireless bills increase by as much as 25 percent — a burden families certainly don’t need in this tough economy," Franken said.

Meanwhile, Sprint, which has helped lead the opposition to the deal, released a statement labeling the Justice Department's lawsuit “a decisive victory for consumers, competition and our country." Sprint has said the merger would seriously threaten its hopes of survival.

"By filing suit to block AT&T’s proposed takeover of T-Mobile, the DOJ has put consumers’ interests first," said Sprint senior vice president of government affairs Vonya McCann.