Today, trade in the stock exchange of my country Israel (TASE) was cancelled due to a union dispute. So clearly, in Israel the answer to the question in the title is "yes". I can't say this comes as a surprise, as our country was founded on the bedrock of socialism, and those roots last until this day. But this is unfortunate as such disruptions surely concern foreign investors (and justly so).
However, I cannot imagine the same happening in the US, and indeed I couldn't find such an occurrence. Did I miss anything? Reading in Wikipedia, it looks like both NYSE and TASE are public (non-government) companies. So how come we see stock exchange strikes in Israel (this is not the first) and not in the US?
Is it because in the US there are multiple stock exchanges as opposed to Israel where TASE is a monopoly? Is it because unions in Israel are more powerful than in the US (and if so, how and why)? Perhaps US stock exchange workers are somehow classified as essential workers who aren't permitted to strike (e.g. by force of the Taylor Law)?