The issue is that, through no fault of her own, she is a security risk due to familial relations and affiliations, and should not have passed any security screening for the position she now holds.
Does it suck that family, even family you may not be close with, could case that? Yes.
But thats life. In the private sector, in many fields, if your family works for so and so, you cannot work in any related or competing firms, and must disclose (in some cases in great detail) who your family is and who they work for, to avoid possible conflicts of interests and other risks.
In this case, the concern (IMO) is the security screening process and disqualifiers, not that Ms. Wiener herself is some kind of Manchurian Terrorist Drone.