[haikuginger]

FWIW, a plain ellipsis should replace any number of words redacted for brevity. E.g., "The US government is violating the due process, equal protection, and habeas corpus rights of immigrants," becomes "The US government is violating the... rights of immigrants."

If replacing a word with another word to convey missing contextual meaning- e.g., "I won't do business with [Mr. Trump] in the future," that's when you pull out the brackets.

[dragonwriter]

Bracketed ellipses are often used in quoted material to mark elisions to make clear that the ellipses are inserted by the party relaying the quote to mark a elision, not ellipses present in the original text.

Most (maybe even all) formal sources that I've encountered use this style, not unbracketed ellipses.