[antiRepublicrat]

I see. But I don't think you can call assaulting a police officer part of her official duties.

[michigander]

It may indeed be debatable as far as "any act performed in the lawful discharge of official duties", however...

She was (or at least she will state as such) at the building in an official capacity and as a member of Congress, she is allowed to forgo the security measures.