I was able to boot into single user mode with GRUB. I was able to remove the password for root so I can login and edit files and fix things but I'm not sure what to look at first.
If I try to login as anyone other than root I get this error before the password prompt.
Code:
type=1400 audit(1257642438.946:75 avc: denied {read } for pid=2540
comm="unix_chkpwd" name="nsswitch.conf" dev=dm-0 ino=12017735
scontext=system_r:system_chkpwd_t:s0-s0:c0.c1023
tcontext=system_u:object_r:etc_runetime_t:s0 tclass=file