A truly stunning display of ignorance, Trump doesn't know what an MOU is

[William Seger]

49. An MOU is considered to be a contract if...

https://en.wikipedia.org/wiki/Memorandum_of_understanding

Whether a document constitutes a binding contract depends only on the presence or absence of well-defined legal elements in the text proper of the document (the so-called "four corners" ). The required elements are: offer and acceptance, consideration, and the intention to be legally bound (animus contrahendi).

...
In international relations, MoUs fall under the broad category of treaties and should be registered in the United Nations treaty collection.[6] In practice and in spite of the United Nations Office of Legal Affairs' insistence that registration be done to avoid 'secret diplomacy', MoUs are sometimes kept confidential. As a matter of law, the title of MoU does not necessarily mean the document is binding or not binding under international law. To determine whether a particular MoU is meant to be a legally binding document (i.e., a treaty), one needs to examine the parties’ intent as well as the signatories' position (e.g., Minister of Foreign Affairs vs. Minister of Environment). A careful analysis of the wording will also clarify the exact nature of the document. The International Court of Justice has provided some insight into the determination of the legal status of a document in the landmark case of Qatar v. Bahrain, 1 July 1994.[7]

And again, the real problem is that when Lighthizer tried to tell Trump that the MOU under discussion will be a binding contract, he simply refused to understand that.