Trump's move on Iran deal? At its core, a compromise with his cabinet.

Donald Trump’s presidency has given new meaning to the phrase “team of rivals.”

Under President Abraham Lincoln, it meant bringing former political foes from his own party into the cabinet. Under President Franklin Roosevelt, it meant forming a diverse, bipartisan cabinet that would present conflicting points of view, allowing the president to draw his own informed conclusions on policy.

For President Trump, it has meant – at least on international relations – cabinet and other top advisers at odds with the boss, pitting a more stay-the-course foreign policy against some of the president’s more dramatic, and often nationalist, impulses. It is a conflict that has increasingly burst into the open.

Trump’s decision Friday to “decertify” the Obama-era Iran nuclear deal presents a stark example. His advisers wanted him to declare that Iran is