The Articles of Confederation gave the new republic the grand powers and none of the practical ones: Congress could make war and peace, but it had to beg the states for money and could not make anyone obey. By 1787 unpaid debts, a half-honoured Treaty of Paris and Shays' Rebellion had shown what that cost. Switch from the Articles to the Constitution and watch which three powers the centre gains, and what the slaveholding states are promised in return.
The Constitution of 1787 gave Congress the power to tax, regulate commerce and enforce its laws, and paid for it with the Great Compromise and three slavery clauses.