Oprah Not Endorsing President Obama’s Re-election + Can he win without her?

According to a few reports, an unnamed source has shared that Oprah Winfrey will be less visible in President Obama’s re-election campaign. As you know, during the 2008 election, Oprah fully endorsed and supported Obama’s campaign efforts by promoting him on her show and speaking and going on the campaign trail with him. In fact, this (Obama’s presidential run) was the first time that she had publicly taken sides in an US presidential election. According to Pop Eater, “For 2012, much has changed for Oprah. She now has her own cable channel called OWN that has been struggling to find an audience — she isn’t going to do anything to alienate them.” What are your thoughts? Can Obama win a second term without Oprah? Are her reasons for NOT supporting him visibly valid? Source