No, really, I did.
Oh, sure, the Department of Defense falls all over itself telling people that signing those "secession" petitions will not affect their clearances, but it is the last two paragraphs that should give you pause:
The Pentagon agency did, however, leave its options open regarding petition signers.
“Please note,” the agency cautioned, ”that DSS has not provided any approved direction or guidance. … This issue is under review and DSS will provide information to contractors when that review is complete.”
And, really, are you surprised by this revelation? In general, foreign nationals do not receive security clearances (shockingly, there are exceptions to that), and by petitioning your state or federal government to secede from the Union, you are functionally petitioning to become a foreign national and renounce your American citizenship, both of which are disqualifying actions for clearances. Should be interesting to see what "guidance" the DSS eventually does provide…
(Found by way of Old NFO.)