Easiest way to fix that is just step around her. Make her irrelevant. Secure an alternate venue and give formal invitations to appropriate parties. They can choose to attend the address or choose to stay home like spoiled children.
Afterwards, issue a memo praising those who chose to attend. Make it an olive branch moment by heaping special praise on (D) and (I) reps for their commitment to country and constituents. Leave obvious silence for those absent, making them look like the obstinate, petty, infantile morons they are.
Brad