The Federal Government can withhold Federal tax dollars for highways for states that post higher speed limits on the Interstate than what the Feds suggest.
the federal government is authorized to tax imports and exports
The Constitution places extremely heavy and borderline burdensome limits on the legislative and law enforcement powers of the federal government. Since around the turn of the twentieth century these lawful limits have largely been ignored by those in power in the federal government.
A system of political limits and controls is system of powers
Mayflower Compact
The Hatch Act limits the political involvement of federal employees.
The federal government sets national speed limits by promising monetary incentives to states that cooperate with their legislature. The states can set their own limits but if they want aid from the federal government they must comply with their mandates.
The Hatch Act limits the participation of federal employees in political campaigns.
Reserved powers
reserved poweres
The US Constitution and its Amendments
The amendment that limits the amount of terms for a person to have only two four-year terms as president in office.
There are many. 1 is the government cannot veto state laws.
Having two sovereigns, the national government and the state governments.
Hatch Act
reserved poweres
Reserved powers