Disruption and uncertainty can provide strategic advantages, Mark Lagon and Ross Harrison of Georgetown University wrote in Foreign Policy magazine. "But what is seriously in doubt is whether Trump's disruption will be strategic or beneficial to U.S. foreign policy interests. Even before getting elected, he acted like a missile without a guidance system."
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He start shooting at his traditional Allies, Partners and Friends even before he assume office.
"Even before getting elected, he acted like a missile without a guidance system." = is a very appropriate description of him.