President Obama's 4-pronged strategy to 'degrade and destroy' ISIS includes a 'financial attack' (according to the Treasury) as they recognize, as The Daily Signal notes, one major hurdle in the way of the 'strategy' is the brutal organization's control of oil fields in Iraq and Syria; which ISIS uses that oil wealth to help finance its terror operations. Here's how they do it...

As The Daily Signal's Kelsey Harkness ( @kelseyjharkness ) notes,

According to the Iraq Energy Institute, an independent, nonprofit policy organization focused on Iraq’s energy sector, the army of radical Islamists controls production of 30,000 barrels of oil a day in Iraq and 50,000 barrels in Syria.

By selling the oil on the black market at a discounted price of $40 per barrel (compared to about $93 per barrel in the free market), ISIS takes in $3.2 million a day.

James Phillips, veteran expert in Middle Eastern affairs at The Heritage Foundation, told The Daily Signal that the revenue gives ISIS a “solid economic base that sustains its continued expansion.”

The oil revenue, which amounts to nearly $100 million each month, allows ISIS to fund its military and terrorist attacks — and to attract more recruits from around the world, including America.

To be successful in counterterrorism efforts, Phillips said, the U.S. and its allies must “push the Islamic State out of the oil fields it has captured and disrupt its ability to smuggle the oil to foreign markets.”