It was not until April 30, 1789, that he was formally installed as President.
Madison and Hamilton were meanwhile going ahead with their plans.

This time was perhaps the happiest in their lives.

They had stood together in years of struggle to start the movement for a new constitution, to steer it through the convention, and to force it on the States.

Although the fight had been a long and a hard one, and although they had not won all that they had wanted, it was nevertheless a great satisfaction that they had accomplished so much, and they were now applying themselves with great zest to the organization of the new government.

Madison was a member of Congress; Hamilton lived near the place where Congress held its sittings in New York and his house was a rendezvous for the federal leaders.
Thither Madison would often go to talk over plans and prospects.