"We’re not going to sit back as a country, and allow other countries to expand their nuclear capabilities with the US just sitting idly by. This president is going to take action, he’s going to make sure that the American interests are protected," Spicer told the NBC’s Today program.
"But just to be clear: the president isn't saying we're going to do this. He said, 'unless they come to their senses.' It's a warning to them that this president isn't going to sit idly by," Spicer added.