With the exception of the federal entities indicated in the Constitution's Clauses 16 & 17 of Section 8 of Article I as examples, entities under the exclusive legislative control of Congress, the states have never delgated to Congress, via the Constitution, the specific power to regulate any of these intrastate issues. The states uniquely have the 10th Amendment-protected power to address these issues.
So it must be an election year, corrupt federal politicians once again dangling the carrot of constitutionally indefensible campain promises in front of low-information voters, voter who have never been taught about the federal government's constitutionally limited powers.
/johnny