"Don't talk about the assassination attempt"

[ArMaP]

However, when I tried your first one, "Assassination attempt on", Trump was the first hit.

Same here, "assassination attempt on" shows "Donald Trump" as the first choice.

---

Google is a convenience, now exploited by the 'algorithm masters.' 

Always was.

The original algorithms showed results sorted by popularity, not by relevance or proximity, the pages with more links pointing to them would be the first on the list.