After the Presidents conversation with Vladimir Putin it appears that a relationship is developing that could require the cooperation of Russian and US forces.
Based on Russian indiscriminate support of the killings and destruction of Aleppo I would be concerned that we provide our superior forces and subject them to the highest risk while the inferior Russian forces take a lesser role.
The only winner in this will be Putin and Rosneft. The capital markets will be allowed to invest in Putins oil monopoly and help make Russia Great Again.

If you don't know what Rosneft is do a web search.