<span>Treaty power is a co-ordinated effort between the Executive branch and the Senate.</span>
A variety of reasons. The ongoing debate about federal power had tipped to the side of the 'Federalists,' for one thing. But also, and perhaps more importantly, the practical experience of the nation during the War for Independence had demonstrated that, without a stronger federal government, it would risk failing in its 'grand experiment' of republican self-governance.
<span>At Fort sumter.
Hope this helps</span>
