The Constitutional Convention was held in Philadelphia, between May and September of 1787 to 1789. During this convention, the weak Presidency was discussed and the Federalists wanted a stronger executive branch. For one, the Feds wanted to eliminate completely the Articles of Confederation, which was responsible for the apparent weak central government. The Feds wanted a more strong and central government; also eliminating power to the states governor.
By the end of the Convention in Philadelphia, there was a new Constitution altogether, and the Anti-Federalists were able to bring along a few details from the Articles of Confederation onto the new Constitution of 1787. This was portrayed in what is known today as the Bill of Rights.