WASHINGTON — Disney and its powerful trade association have fought to stop the law’s spread abroad.

Marriott has asked Congress to amend the law.

IBM has a plan to slim it down.

An unusual constellation of powerful companies and industries are fighting to weaken Big Tech by limiting the reach of one of its most sacred laws. The law, known as Section 230, makes it nearly impossible to sue platforms like Facebook or Google for the words, images and videos posted by their users.

The companies’ motivations vary somewhat. Hollywood is concerned about copyright abuse, especially abroad, while Marriott would like to make it harder for Airbnb to fight local hotel laws. IBM wants consumer online services to be more responsible for the content on their sites.

But they all see an opening as both Democrats and Republicans increasingly raise their own concerns about the power of the tech industry and the law. Section 230 of the Communications Decency Act of 1996 has helped Facebook, Google and YouTube grow into giants by holding only the people who post the billions of pieces of content on their services responsible for libel or other legal issues.