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His threats to take Greenland are also likely aimed at curbing China's ambitions in the Arctic.

The restrictions on the sale of key chips to China, including the most recent move tightening exports from US chip giant Nvidia, for instance, are aimed at curbing Xi's ambitions for tech supremacy.

Commissioners have worked together this year on key issues, including curbing robocalls and promoting spectrum-sharing among satellite systems.

But Democrats argue that federal judges are doing their jobs, and that curbing their ability could cause chaos if their rulings are effective only within certain districts and not others.

The interior ministry says the cameras have "significantly contributed to enhancing safety, curbing crime rates, and swiftly apprehending offenders".