Don't you mean sentences. Trump actually inserted periods and explanation marks. However, he is not known for excellent grammar, so there are likely some run on sentences in that pile of shit he or the White House staff posted.
The period, or full stop, is perhaps the simplest and most frequently used punctuation mark, yet it has its own surprising origins. It can be traced back to ancient Greek, where it was used to signify a pause in speech, marking the end of a sentence. The Greek word “stichos,” meaning line or verse, is where we get the concept of a “full stop” at the end of a thought. Early Greek writers, including Aristotle and Plato, used marks to indicate pauses in speech, but it wasn’t until the Middle Ages that the period was formally used to end sentences.
The exclamation mark has its roots in the Latin "Io," meaning joy, and was originally called the note of admiration. The letter "I" was written above the letter "O" to give the appearance of a sign that looks like the modern-day exclamation mark. The question mark, or note of interrogation, has a somewhat esoteric history, with one version dating back to the 8th century as a lightning bolt-shaped punctus interrogative used for similar purposes. Another version dates to the Middle Ages and the Latin term "quaestiō;", meaning question.