Trump doubles down on nuclear talk: 'Europe is a big place'
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"I don't want to take cards off the table; I'd never do that," Trump said during a phone interview on "The O'Reilly Factor," adding, "the last person to press that button would be me."
 
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Guest host Eric Bolling acknowledged not ruling out using nuclear weapons against the Islamic State in Iraq and Syria (ISIS), but he pressed Trump about the possibility of using them in Europe.
 
"Europe is a big place. I'm not going to take cards off the table," Trump said. 
 
Trump raised eyebrows Wednesday for insisting during a town hall on MSNBC that he wouldn't take nukes off the table in any situation, including in Europe.
 
The businessman has argued that he wants to remain unpredictable on foreign policy matters and has suggested a U.S. military presence in Japan and South Korea be replaced by their own nuclear arsenals.
 
White House deputy national security adviser Ben Rhodes said Thursday it'd be "catastrophic" if countries like Japan and South Korea obtained nuclear weapons, citing opposition to nuclear proliferation.
 
During his Fox News interview, Trump appeared to tout his opposition to the Iraq War in an attempt to cast himself as cautious on major foreign policy decisions.
 
"The last person that wants to play the nuclear card, believe me, is me," Trump said. 
 
"But you can never take cards off the table, either from a moral [standpoint], from any standpoint, and certainly from a negotiating standpoint."
 
Updated April 1, 9:20 a.m.