Lupron is female hormones, not chemotherapy--at least under any common modern definition.
But, if you want to use the broadest of historical definitions, taking aspirin could be considered chemotherapy.
The point remains--he had no physical limitations requiring him to drop out of the Senate race.
My point remains--I think it is presumptuous of you to claim to know that.
But, if that's your opinion you're entitled to it. I'm still not sure why it's so important to pin down why he dropped out of the Senate race in the first place.