Where did you find this bit of nonsense?
Here's what the Constitution says:
No Person shall be a Senator who shall not have attained to the Age of thirty Years, and been nine Years a Citizen of the United States, and who shall not, when elected, be an Inhabitant of that State for which he shall be chosen. [U.S. Constitution, Article I, section 3, clause 3]
But that does not answer what Louisiana law states about residency requirements for US senators.
If it was not a violation of state law, Col. Rob Maness would not use the issue against her.