How Does the Washington Post Know Trump's View of National Security?

It is absolutely bizarre how the media continually feel the need to tell us what politicians think. The Washington Post was on the job today in an article that discussed Donald Trump's threat to impose 25 percent tariffs on imported cars for national security. The article told readers:

"The president holds an expansive view of national security, describing imported products like steel or passenger sedans as worrisome threats to the United States."

Really? How does the Post know that the pre...