It is very hard to unseat a sitting Senator. He would have probably had little trouble keeping the nomination and would have all but certainly beat the Democrat.
Simply hard to beat a sitting Senator.
There are a lot of angry people feeling betrayed by RINOs. I know that neither Marco, or the GOPee understand this fact. There are some very unhappy people down here. Rubio has done nothing but tick them off since he got into office. So Marco holding his seat was not a sure thing. We’ll find out if the FL GOPee has figured it out yet.