[Caipirabob]

Her team will call in a bomb threat.

However given that she is losing and needs this, I do not believe it will be canceled. She will be there, and so dosed up on drugs that you'll get buzzed standing in the same room if the smell of formaldehyde doesn't overwhelm you first.

[metmom]

Her team will call in a bomb threat.

My thoughts exactly.

Some sort of terrorist episode involving guns or a minor explosion outside the building.

I doubt she will collapse. The enemy protects his own and would want her to look as good as possible so she stands as much chance of winning as possible.