Why didn't Romney get the National Right to Life endorsement?

Brody has the answer:

The Romney campaign may be disappointed because they didn’t get the endorsement from National Right to Life but maybe the organization had a look at the following videotape. If you go about three and a half minutes in, Romney is seen distancing himself from being endorsed by Massachusetts Citizens for Life during a debate while he was running for Governor in 2002. He didn’t want any part of that endorsement at the time.

Here's the video: