The Congress and the Supreme Court provide a constitutional check on the President's powers
The President has the constitutional power to grant pardons.
It can declare the presidents actions unconstitutional.
The presidents power to make executive decidions
The federal courts can check the Presidents power by that courts can declare executive actions unconstitutional.
This would probably require a Constitutional amendment.
veto
"The federal courts can check the Presidents How_can_Federal_Court_check_the_presidents_powerby that courts can declare executive actions unconstitutional."
Congress can check the power of the Supreme Court by introducing amendments to the Constitution.
Veto
The first president, George Washington was commander-in-chief, as are all presidents since this is a constitutional power.
veto acts passed by Congress
To veto acts passed by congress :)