For the first time in Donald Trump’s presidency, the West Wing soap opera appears to be in hiatus, with many of its starring characters (Gary Cohn, Hope Hicks) either permanently offstage or with much reduced roles (John Kelly, Jared Kushner). Currently, there’s one star—a situation Trump is obviously enjoying—and his new freedom is used to focus ever more closely on his perceived enemies and obsessions. Amazon, whose owner, Jeff Bezos, also owns The Washington Post, is currently the main target. Trump has ripped into Amazon in recent days, claiming in a series of tweets that Jeff Bezos’s tech giant benefits from billions in subsidies from the U.S. Post office while skirting sales taxes. “Unlike others, they pay little or no taxes to state & local governments, use our Postal System as their Delivery Boy (causing tremendous loss to the U.S.), and are putting many thousands of retailers out of business!” Trump tweeted. On Monday, he wrote: “Only fools, or worse, are saying that our money losing Post Office makes money with Amazon. THEY LOSE A FORTUNE, and this will be changed. Also, our fully tax paying retailers are closing stores all over the country . . . not a level playing field!” The tweets caused Amazon’s stock to plunge 5 percent on Monday.

Now, according to four sources close to the White House, Trump is discussing ways to escalate his Twitter attacks on Amazon to further damage the company. “He’s off the hook on this. It’s war,” one source told me. “He gets obsessed with something, and now he’s obsessed with Bezos,” said another source. “Trump is like, how can I fuck with him?”

According to sources, Trump wants the Post Office to increase Amazon’s shipping costs. When Trump previously discussed the idea inside the White Hose, Gary Cohn had explained that Amazon is a benefit to the Postal Service, which has seen mail volume plummet in the age of e-mail. “Trump doesn’t have Gary Cohn breathing down his neck saying you can’t do the Post Office shit,” a Republican close to the White House said. “He really wants the Post Office deal renegotiated. He thinks Amazon’s getting a huge fucking deal on shipping.”

Advisers are also encouraging Trump to cancel Amazon’s pending multi-billion contract with the Pentagon to provide cloud computing services, sources say. Another line of attack would be to encourage attorneys general in red states to open investigations into Amazon’s business practices. Sources say Trump is open to the ideas. (The White House did not respond to a request for comment.)

Even Trump’s allies acknowledge that much of what’s fueling Trump’s rage toward Amazon is that Amazon C.E.O. Jeff Bezos owns The Washington Post, sources said. “Trump doesn’t like The New York Times, but he reveres it because it’s his hometown paper. The Washington Post, he has zero respect for,” the Republican close to the White House said. While the Post says that Bezos has no involvement in newsroom decisions, Trump has told advisers he believes Bezos uses the paper as a political weapon. One former White House official said Trump looks at the Post the same way he looks at the National Enquirer. “When Bezos says he has no involvement, Trump doesn’t believe him. His experience is with the David Peckers of the world. Whether it’s right or wrong, he knows it can be done.”