Giuliani: Trump makes 'insensitive' remarks because he's not a politician
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Former New York City Mayor Rudy Giuliani prefers an "unscripted" Donald TrumpDonald TrumpHarry Reid reacts to Boehner book excerpt: 'We didn't mince words' Man arrested for allegedly threatening to stab undercover Asian officer in NYC Trump says GOP will take White House in 2024 in prepared speech MORE to Hillary ClintonHillary Diane Rodham ClintonClose the avenues of foreign meddling Pelosi planned on retiring until Trump won election: report Pence autobiography coming from Simon & Schuster MORE, whom he called a crook. 

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"It may be that he may make more insensitive statements because he's not a polished politician," Giuliani told radio host John Catsimatidis on “The Cats Roundtable” on Sunday. 

Trump, the Republican presidential nominee, has become ensnared in more controversy this week after calling President Obama the "founder" of the Islamic State in Iraq and Syria and saying "Second Amendment people" could stop Clinton from appointing liberal justices to the Supreme Court, which many saw as a joke about an assassination attempt. 

Giuliani also slammed Clinton, the Democratic presidential nominee, saying she would be weak on terrorism and pointing to Seddique Mateen, the father of the Orlando nightclub shooter, who sat behind her at a rally. 

The campaign said they didn't invite Mateen or know he was there. 

"This woman had, sitting behind her, the father of a terrorist, and a terrorist himself, sitting behind her at a rally, and somehow that's not bigger news that Donald Trump making an ambiguous statement?" Giuliani said, referring to Trump's comments this week about Second Amendment supporters.