The U.S. government sued to block AT&amp;amp;T Inc.&rsquo;s proposed $39 billion acquisition of T-Mobile USA Inc., saying the deal would &ldquo;substantially lessen competition&rdquo; in the wireless market. 
The Justice Department complaint was filed today in federal court in Washington. The U.S. is seeking a declaration that Dallas-based AT&amp;amp;T&rsquo;s takeover of T-Mobile, a unit of Deutsche Telekom AG (DTE), would violate U.S. antitrust law and a court order blocking any arrangement implementing the deal.
&ldquo;AT&amp;amp;T&rsquo;s elimination of T-Mobile as an independent, low- priced rival would remove a significant competitive force from the market,&rdquo; the U.S. said in its filing.