PETA also tried to get an ad aired on the Super Bowl, and it was also rejected. However there was no mention of political advocacy as the reason why NBC rejected theirs. Instead it was barred primarily due to the sexually explicit nature of the ad.
NBC has come under fire both from conservative talk show hosts from radio and TV and from their own Saturday Night Live for being in the tank for Barack Obama. This pro-life ad rejection is simply the latest example of their nearly complete abandonment of objectivity, and why the Fairness Doctrine being proposed by members of Congress should extend well beyond talk radio, or better yet, be axed altogether.
Here is the ad again:
(h/t: Gateway Pundit)