The states should require proof of being a "natural born citizen" in order to file for and be placed on a primary election ballot or general election ballot for electors for President of the United States. Anyone not meeting the requirements of office such as being at least 35 years old, a "natural born citizen", or legally barred from holding the office of President under the 22 amendment should be barred from appearing as a candidate in all states for any primary for President or general election where electors are chosen for the office of President of the United States.
Not only should the states ban anyone constitutionally banned from being president from being on a candidate in a presidential primary or election of electors from appearing on any ballot, but the states should be made to disclose their documentation of each candidate. Individuals or organizations should be able to sue the various state governments to produce the documents proving that a candidate meets the qualifications for the office of President under the Freedom of Information Act.
Since the chusing of electors is under the direct, unchecked, control of State Legislatures, perhaps you should take it up with them.
I think all Federal legislation regulating the acts of the People with regard to elections (except as provided for in Article I, section 4) is unconstitutional - please let's not make the problem worse.