The Obama campaignâs effort to pressure TV stations in Pennsylvania and Ohio to stop airing a National Rifle Association ad is âfrighteningâ and âdangerous,â a campaign finance expert said. âWhen a candidate threatens a broadcaster with government sanction over the content of an ad, it is very worrisome to the First Amendment and the guarantee of free political debate,â said Sean Parnell, president of the Center for Competitive Campaigns, an organization that focuses on money in politics.

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