NATO Secretary General Stoltenberg on Trump's statements: "Undermines our entire security". Donald Trump said in a campaign speech that he would not protect defaulting NATO members from a Russian attack.

EU Commissioner Thierry Breton told broadcaster LCI that Trump's stance was not new. "Maybe he has memory problems," Breton commented on the South Carolina Republican's story. The Green Party's security policy spokeswoman, Sara Nanni, told Handelsblatt that Trump was erratic.