The Convention
The convention in 1788 proved to be a major game-changer. The Legislature was divided into two, the House of Burgesses and the Senate. The Executive branch had a president who was elected by the Elective Commision, composed of 35 members from the Legislative branch. The EC would hold a referendum among Parliament, and, if the majority responded Yea, then the President was elected. The Judicial Branch would consist of 9 elected judges that serve for life. A Prime Minister would lead the House, and was part of the Executive Branch, vetoing the President's actions with 2/3 majority of the House.
Election of 1790
George Washington was an obvious choice. But on the opposition stood Thomas Jefferson AND Aaron Burr. John Adams was listed as a Pro-Washington, later shortened to Washingtonist, and then a four-way election was crowned into the dust. First, though, the House and Senate would vote. In the House's 114, 83 were Pro-Washington. The remainder [of 31] was Anti-Washingtonist. In the EC, it was an 18-17 split, nearly even. In the end, Washington/Burr was elected.