The UK and USA have in place at least minimum measures to control the power of the 'leader'

Follow the Australians for War Power Reform on https://warpowersreform.org.au/

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"The House earlier this month passed a war powers resolution to bar Trump from taking military action against Iran without congressional approval. But it was a concurrent resolution, meaning it doesn’t require the president’s signature and is non-binding, and Republicans dismissed it as largely symbolic.

Meanwhile, Democratic Sen. Tim Kaine is also pushing for the Senate to vote on a war powers resolution to limit Trump’s ability to take military action against Iran without congressional approval. Kaine in mid-January said he had the GOP votes to see the bill passed."