The fact that he is 90 is not keeping him off TV mouthing off. He is not as senile as you seem to think he is.
I learned why Dole is upset w conservatives a month or so ago.
He is upset because Liz rolled out his wheelchair on the Senate floor to get Republicans to pass help a Global UN Disabilities Treaty with Dems, United Nations Convention on the Rights of Persons with Disabilities (CRPD), and they voted against it. Dems played this up, the GOP channel ignored it. So Dole is steaming about it and going on TV trying to cause trouble.
Bob Dole was a big supporter of the AWDA in the 1990s too.
Dole brings back bad memories.