So did Senator Geary ever realize that he was being set up by the Corleone Family with the prostitute? Didn't he put it all together that he didn't remember anything and that Tom was being soooo helpful dispite their differences in the past? Initially he was too shocked to realize he was being set up but woulden't he after some time?

I always believed that he knew by the time the trial came about, but from our other Sen. Geary question, it seems like he was trying to help Michael (maybe not help, but not hurt).