Tim Kaine actually said...

The administration and Congress. You understand that Congress has a role in this as well, not just the administration.

What is the international legal justification for the U.S. taking military action in another country without the request of that country?

What matters ultimately in war is strategic success, attainment of our political aims, and the protection of our national interests.

This is not a military failure. Instead, it is a failure of strategy, a failure of policy, and most of all, a failure of leadership.