It's not only security clearance
It's also a location designated on an ISIS kill list, Lexington Park, MD is one of them. The MSP seems to be in denial when a known terror organization lists your town; apparently, you do not have a need to protect yourself or your family.
http://www.snopes.com/2015/11/16/isis-kill-list/
Local article: http://www.thebaynet.com/articles/0315/lexington-park-reported-on-isis-hit-list.html
The MSP will continue to deny, until an attack happens here.
That is an indication of the MSP's lack of clearance and need to know. They can get the info they need via the JTTF (a "Yes" or "No" answer with U/FOUO/LES safeguarding), but they are either too stupid or lazy to do so.
EDIT: They will NEVER get Compartment information because most are Unacknowledged and even its very existence cannot be revealed to anyone outside the Compartment. If they indicate otherwise, either someone or some facility is going to have their clearance Terminated with Prejudice for Cause (and Flagged so they will never be cleared again) or they are flat out lying. I tend toward the latter explanation, because it's part of their job description.