Martin or whoever may rule this OT as well, but the questions raised in the original post seem to cover how Trump communicates at all, not just literally how he answers questions.
>>dass er z.B. hauptsächlich ein- und zweisilbige Wörter benutzt, dass er seine Sätze so konstruiert, dass sie auf einem "Buzz-Word" enden und dass er dem Zuhörer gerne Befehle erteilt
This little article in this week's New Yorker goes well over the top with sarcasm, but it also gives a glimpse of 'Fox and Friends,' the morning talk show that seems to trigger many presidential tweets. Part of the knack seems to be how the president gets the TV hosts to parrot his own questions, which is a good trick if you can do it, and also saves you from having to answer questions from other people, such as reporters.
The cycle of talk to tweet to talk to tweet, ad infinitum, seems particularly noteworthy.
'How "Fox and Friends" Rewrites Trump's Reality:
The thin fourth wall between the President and his TV'
Andrew Marantz, New Yorker, January 15, 2018
In the Fox News studio, the fresh tweets were displayed in bold type on a thirty-foot-wide screen, Trump’s larger-than-life Twitter avatar peering, Rushmore-like, into the middle distance. (Presumably, the real Trump, in the Presidential bedroom, peered back, an elderly youth gazing into a shallow pool.) ...
A few days into the [Asia] trip, en route from China to Vietnam, he walked to the rear of Air Force One, where the press corps was sitting, to deliver some off-the-cuff remarks. “I know they like to say—people that don’t know me—they like to say I watch television,” he said. “People with fake sources—you know, fake reporters, fake sources. But I don’t get to watch much television, primarily because of documents. I’m reading documents a lot.” ...
It later became clear that the impetus for Trump’s outburst was an e-mail he’d just received from the Times—a list of fifty-one fact-checking questions for an article about him. Of these, he felt compelled to respond, indirectly, to just one, about his “prodigious television watching habits.” ...
(A chart of Trump’s 2017 tweets, created by a University of Chicago graduate student and plotted by time of day, reveals an unmistakably dense band between 6 a.m. and 9 a.m., when “Fox & Friends” is on the air.) ...
Not fair, not fair, to sleep through it all. Someone needs to be awake to warn me when the North Korean bomb is on its way -- or when the latest smartphone warning is a fake, as in Hawaii. Constant vigilance is required.