"Why Fred?"
For those (like me) who asked the above question, National Right to Life explains their endorsement of Fred Thompson for President:
National Right to Life endorsed Fred Thompson based on three factors: his commitments on life issues, his record on life issues and his ability to win.
UPDATE: An alternate take:
The reason the National Right to Life Committee is endorsing Fred Thompson is that they figured the best way to preserve life is to not piss off Fred Thompson.