Answer:
the Clean Water Act
Step-by-step explanation:
As Nixon wasn´t eventually fond of the law, and actually vetoed after the house and the senate had already approved it, eventually they overturned the veto and made it law, costing 24 billion dollars, Nixon hold half of the budget for that law, and kept the States from being able to access that money with no actual power to do so, he expanded his federal influence on the states by doing it.