Source?
American Conservative Union.
McCain's lifetime voting record is 83% conservative.
http://acuratings.com/
Leaving John McCain's name off this list is like leaving Dolly Parton's name off the list of the Top 10 County/Western Singers with Big Tits.
My thoughts: McCain is actually more dangerous to the conservative movement (strike that)... he's more dangerous to the nation because of his voting record.
You're overstating the case. McCain's 2002 score - 78, his 2003 score - 75, his 2004 score - 72. His lifetime ACU score was from being right back in the 80s and early 90s before he became the media's darling "maverick". Each year, his ACU score sinks lower and lower.