call her a liar for a few weeks and do their very best to undermine her credibility but they won't expose themselves to other questions
on their familiarity and outright support of Trump. Once they're testifying, they will open to too many questions.
It's odd, the one thing the R's want to deflect to is the one thing where she wasn't there to witness the action or dialogue herself.
There are so very many other issues about Trump and his ways along with the knowledge of the planned attack by those she worked
alongside with during her time in the Trump admin. Her inside knowledge is what the R's are determined to stay far away from.
Deflect, deflect as long as you can - destroy her credibility and move on.