President Trump needs the Supreme Court to validate some of his most sweeping exercises of presidential power — and to stretch or outright overturn some of its own precedents in order to do so.

The big picture: The rulings standing in Trump's way are conservative ones. The right's long, successful campaign to curtail presidents' domestic powers is on a collision course with a Republican president who's shattering historical precedents at every turn. • A ruling that stopped FDR from grabbing more power from Congress at the height of the New Deal is now on the chopping block — because Trump wants to do the same thing FDR was trying to do. • Trump's Justice Department is also trying to convince the high court's six conservative justices that the principles they invoked to block President

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