Widely Believed (Is Considered)
2 related grammar points that express the same core idea - compared below so you can tell which one to reach for.
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とされる / とみられる
Reporting a current assessment that could still be revised.
～とみられる vs ～とされる: とみられる reports how something is currently viewed, often on provisional evidence, which is why news writing uses it for ongoing stories. とされる states an established or official position, so it claims more settled ground.