(Undated) -- Senator Rand Paul says he's afraid the National Security Agency could be spying on President Obama. In an interview this week with "The National Review Online," the Kentucky Republican said he guesses that the NSA has collected data on the President's cell phone. Paul also said he believes the NSA might be tracking Pope Francis. Earlier this week, the Italian magazine "Panorama" claimed the NSA eavesdropped on millions of Italian calls, including calls made by cardinals during the conclave that elected the Pope last spring. The NSA denied the claim and the Vatican said it's "not aware" of NSA spying on church leaders and isn't concerned about it.