Which court case had the greatest impact on the level of success reached by the Progressives?

The Supreme Court ruled that the federal government had the right to regulate holding companies which would unfairly eliminate competition in the marketplace. For Progressives such as Teddy Roosevelt, the court case was a huge victory against the trusts that had traditionally had its way with the court system.

the right answer is the constitution

you didn't give any answers to choose from so i can't with this but, i do know something that the mexican government would be worried about and that is the wall that donald trump is currently trying to get up.