Reading comprehension issue   To   federal trustbusters began their long eventually futile attempt to break up Morgan and Schwabs creation  New competitors including a company run by Schwab quickly diminished the companys market dominance  A hundred years after it controlled twothirds of the domestic market US Steel shipments account for about  percent of US consumption   Source Steel Standing US Steel celebrates  years   For anybody but a cretin with reading comprehension issues the above would constiute a valid citation supporting this article excerpt  The federal government attempted to use federal antitrust laws to break up US Steel in  but that effort ultimately failed Time and competitors have however accomplished nearly the same thing In its first full year of operation US Steel made  percent of all the steel produced in the United States One hundred years later its shipments accounted for only about  percent of domestic consumption