Answer:
<em>Congress override Presidential Veto</em><em> is the best example of a check on presidential power</em>
Explanation:
The President has a power to reject to approve a bill. The President decides what money is required for each government department. The Constitution explicitly allows the president the power to sign or veto enactment.
When the President rejects a bill he still requires the 2/3 votes from the chamber of congress who votes on the bill. Veto is the power to unilateral stop a law or bill passed.
The allies used convoys to escort merchant ships and minefields to stop ships heading to the North Atlantic
He used his political ties to push programs through bipartisan support including his acts on Civil Rights and Medicare/Medicaid. He helped pass the Voting Act of 1965