Can a senator do that? At least in the US, a single senator can't. If it is something in law, a senator will call for review, determine if other laws have bee

Can a senator do that? At least in the US, a single senator can't. If it is something in law, a senator will call for review, determine if other laws have been broken, draft a new law, get the law passed, etc. But the review process is often enough to get things moving. The governor might be able to take a direct action depending on the state, as could the president.