I understand the usage of
have somebody do something
However, a post says
anti-piracy legislation under consideration in Washington has some websites in a tizzy.
There is no "do" there, is this another pattern or just omitting some verb?
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Here's an excerpt from the Wiktionary definition of "have" (and the definitions are surprisingly close to each other, which makes this good here):
The usage you're thinking of (have somebody do something) applies to definition (14).
Have him call me later. AKA: Command him to / Request that he call me later.
The usage the post is using applies to definition (15).
The speech had people upset. AKA: The speech caused people to be upset.
Hopefully this is helpful to you.