Five global front lines that could define Obama's final two years

The comment underscores how a president tagged as “leading from behind” – even from within his own White House – foresees tackling the major foreign policy challenges of his final years. From the battle with IS to Iran's nuclear program to an embrace of international trade deals, Obama's clear signal from the State of the Union is that cooperation with partners – and even with longtime adversaries, as in the case of Cuba – will continue to trump a rush to confrontation.