They both do it

In fairness to both sides of the political divide, I have to admit that some prominent Democrats are as guilty of word salad as is President Trump. This is from a speech given by Kamala Harris in Iowa on September 30:

“We need to have a strategy that is a winning strategy, about saying that we have got to recognize the challenges before us as a nation and the world are big challenges about who we are, our definition, our standing, and our strength as a nation. And to meet those challenges it will not be about going back to the good old days, it will be about looking forward and taking on the challenges that meet us today and — the winning strategy is that the right thing to do is say that we will address the big challenges of our nation, the issues that wake people up in the middle of the night.”

“Challenges” used five times in two "sentences", one of whch isn't even a sentence. Good grief.
But at least nobody had to deliver instantaneous translation into another language.
Although simply translating this into English might be a good idea.

Back in the early Pleistocene, when some schools still made a casual pass at teaching something, I had an English class in which each of us was required to stand up in front of the class and talk for three minutes on a topic of the teacher's choosing. Using complete sentences. (I admit that I was frequently guilty of the evasion used by the kid who was an expert on worms. "My report is on birds. Birds eat worms. Now, worms...")

President Trump and a number of the Democratic candidates are old enough to have gone to school in those bygone days. "What do they teach them at these schools?"