Yes, Obama did work with Clinton as she was Secretary of State, but I think you have to look at the ultomate big decisions where Obama refused to escalate such as over Ukraine or Syria. He held the crazies back and that takes some doing because the billionaires are champing at the bit to start.
"Hacked Emails Reveal NATO General Plotting Against Obama on Russia Policy
Gen. Philip Breedlove, until recently the supreme commander of NATO forces in Europe, plotted in private to overcome President Barack Obama’s reluctance to escalate military tensions with Russia over the war in Ukraine in 2014, according to apparently hacked emails from Breedlove’s Gmail account that were posted on a new website called DC Leaks.
Obama defied political pressure from hawks in Congress and the military to provide lethal assistance to the Ukrainian government, fearing that doing so would increase the bloodshed and provide Russian President Vladimir Putin with the justification for deeper incursions into the country."
theintercept.com/2016/07/01/nato-general-emails/
You've got bankers, you've got billioanires, you've got the bought and paid for political class with their charidees and their billionaire donations from countries like Saudi Arabia or wherever, champing at the bit to start, and the ultimate test is that Obama faced all the crazies down and prevented a greater war.