And your evidence for this is? The steel industry was regulated against consolidation after the trustbusters broke up US Steel.
Umm ... since US Steel is still around, when was it broken up? "Not surprisingly, U.S. Steel was prosecuted for violating antitrust laws. It escaped dissolution by only one vote in the U.S. Supreme Court." (http://www.businessweek.com/2000/00_35/b3696013.htm)