The remaining 125 UN member States have escaped sharing the cost and responsibility of confronting and defeating Islamic State.
Trump's
reprimand of NATO would indicate he considers the Obama-led coalition has been a very bad deal for America.
Trump can rectify this situation by jointly co-sponsoring with Putin a United Nations Security Council resolution authorising the use of force against Islamic State under Chapter V11 of the UN Charter.
Russia and America have previously expressed their willingness to involve the Security Council.
Russian Foreign Minister Sergei Lavrov made this clear on
18 November 2015:
"The Security Council needs to give preferential attention to the task of creating a solid legal foundation for the fight against this evil [Islamic State] and for the mobilization of an actual global coalition in response to this common uncompromising challenge for us all."
President Obama
preached a similar mantra in St Petersburg on 6 September 2013:
"And I respect those who are concerned about setting precedents of action outside of a U.N. Security Council resolution. I would greatly prefer working through multilateral channels and through the United Nations to get this done."
Mentioning any relationship with Russia is a very sensitive issue in American politics today.
However Trump may well have had Russia in mind when he
told Congress:
"America is willing to find new friends, and to forge new partnerships, where shared interests align. We want harmony and stability, not war and conflict."
Defeating Islamic State is a shared interest of Trump and Putin.
Co-operation in the United Nations Security Council will materially advance that objective.