An example of a check on the power of the legislative branch could be when the president decides to veto or reject a law that Congress has passed. ..However, an example of a check on the power of the executive branch could be if Congress decided to override a presidential veto. I guess another better example would be that the judicial branch has the power to declare acts of congress unconstitutional.
Hope this helps! :D
The idea that states have powers separate from the federal government.
although there were several purposes to these the primary purpose of corporate shareholder trusts that were created in the late 1800s was to A to limit competition