Not even President Trump reliably speaks for President Trump.

Two stories in the New York Times this morning highlight a problem with the Trump presidency.

Actually, it's two problems, but they're related. The first is that no one but President Trump reliably speaks for President Trump.

President Trump was watching television on Sunday when he saw Nikki R. Haley, his ambassador to the United Nations, announce that he would impose fresh sanctions on Russia. The president grew angry, according to an official informed about the moment. As far as he was concerned, he had decided no such thing. 

The rift erupted into open conflict on Tuesday when a White House official blamed Ms. Haley’s statement about sanctions on “momentary confusion.” That prompted her to fire back, saying that she did not “get confused.” The public disagreement embarrassed Ms. Haley and reinforced questions about Mr. Trump’s foreign policy — and who speaks for his administration.

The second: Not even President Trump reliably speaks for President Trump:

After publicly flirting last week with having the United States rejoin the Trans-Pacific Partnership, President Trump appeared to rebuff the idea once and for all late Tuesday.

In a Twitter post at 10:49 p.m., Mr. Trump said that although Japan and South Korea would like the United States to join the 11 other nations in the multilateral trade agreement, he had no intention of doing so. The decision put an apparent end to a meandering trade policy in which Mr. Trump pulled out of the deal in his first week in office, before suggesting last week that he was having second thoughts.

 President Trump's statements are like the weather: If you don't like them, wait five minutes. Somebody will surely argue that this is a smart way of being president — keep everybody off guard — but it isn't. "Mercurial" is interesting in TV show characters, maybe. It's bad governance.