Because like other people who have reached this "level" in life - they have huge egos. they are surrounded by people who praise them all day, and tell them they are great, so they believe it. they are no different then many US corporate executives.
or maybe is the "Schiavo" effect that scared a lot of republicans and now they feel they should keep their distance from the 'religious right,'
I don't' know what it is, but some people have ideas out there. Maybe they are hoping that 'religious right' will push so much to the right, that it will split the party... hmm... interesting. BTW, I am part of the religious right, so don't want anyone thinking I am nocking it.
(Oh, he loves the attention!... I am watching him on C-SPAN, Road to the white house 2008 now).