The 17th amendment to the US Constitution establishes the direct election of United States Senators by popular vote. This amendment was ruinous, as it took away power from the States to appoint Senators to represent their own State’s interests. Instead, now Senators represent their national party’s interests.
I would repeal the 17th amendment.
I would amend the Constitution for the Senate to function primarily as the protector of the Constitution itself to limit the powers of the Federal government, and to preserve the power of the States and the People. This would be done by giving every State veto power, if both Senators from any State agree. This would force most legislation to be extremely narrow in scope. Virtually nothing could become law with any significant opposition from any part of the nation.
Furthermore, we need the process of repealing legislation and regulations to be far easier than the process for introducing them. Therefore, when both Senators from any State agree to repeal a law or regulation, it is done. This is equivalent to exercising a veto after a bill has become law. This makes perfect sense, because the real-world benefits, costs, and unintended consequences don’t become visible until a law has been in effect for some time.