Congress overriding a presidential veto with a 2/3 vote
It can declare the presidents actions unconstitutional.
The President has the constitutional power to grant pardons.
administrative power
The federal courts can check the Presidents power by that courts can declare executive actions unconstitutional.
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The supreme court can make sure the president doesn't abuse his power by deeming laws bills passed by the president unconstitutional.
veto
discretionary power
"The federal courts can check the Presidents How_can_Federal_Court_check_the_presidents_powerby that courts can declare executive actions unconstitutional."
the system of checks and balances
judicial power
The president can veto bills that are proposed to him, address Congress formally, and appoint justices to the USSC that are favorable to his political views and can use judicial review over Congress.