If you are talking about the Second Industrial Revolution, then the person who had a monopoly in the steel industry was Andrew Carnegie.
Hope this helps!
Hi Frankie! You have to actually tell us your question, this doesn't give us much information about what you need! and I also I believe this is under math, not history!
He was the Secretary of State
Judicial Review is the ability to review new laws to see if they are within the guideline of the Constitution. If the law is not within the guidelines, it is called unconstitutional and is discarded.