Trump reiterates his accusations against Italy: "It behaved very badly."

Donald Trump reiterated his accusations against Italy and other NATO allies. "Italy has behaved very badly," the president said in the Oval Office.

And then, turning to his allies, he added: "They weren't there for us, and we spent billions of dollars on them."

At the same venue, speaking to reporters, the tycoon reiterated his warning to Iran that if it does not respect the agreement, the United States will retaliate: "If it does not respect the agreement or if it does not behave well, I will do what I have to do," he said.