Because he wants to die as a sitting senator and have a giant show about him after he is gone....lie in state in the Senate building or somewhere similar and have 3-4 days of the news talking about him as if he were a president which he if course could never be because he is a small man who is a loser.
I agree. He wants to die as a sitting senator. He probably hopes it will shine over all the crap he has pulled for decades.