Only the United States has the clout to convene such a summit. Only the U.S. can demand real change, and only the U.S can offer security reassurances to turn the political tide in the Middle East.

In particular, the time has come to confront the government of Qatar, which funds and arms ISIS and other Islamist terrorist groups such as Hamas. The tiny Gulf potentate has never had to choose between membership in the civilized world or continuing its sponsorship of regional killers. The U.S. has the most leverage. We have alternatives to our Combined Air and Operations Center in Doha, the al Udeid air base, other bases and prepositioned materiel. We should tell Qatar to end its support for terrorism or we leave.

Second, the economic challenge: ISIS may now be the richest terror group in the world. Through hostage taking, criminality, conquest and outside financial support, ISIS is building a war chest measuring in the hundreds of millions of dollars. It has portfolio managers, bankers and other accouterments of a proto-Treasury.

These facilitators have not come under pressure in the way the West has challenged al Qaeda and Iran’s bankers. The intelligence is available to exert this pressure, but the U.S., Europe and the rest of the world are moving at a glacial pace.