Probably because they had limited funds and they knew Bush would take out McCain.
Why do you think that NARAL gives McCain a ZERO to FOUR percent voting record?
The Southern Republican Leadership Conference 2006
Aired on Fox News, March 13, 2006 (Hannity & Colmes)
OX NEWS: Which Supreme Court justice do you most identify with?
SEN. JOHN MCCAIN: I like all of them. I don’t have any, I mean Republican . . . I don’t particularly . . . Sandra Day O’Connor was my favorite...