Donald Trump, Laying Out Foreign Policy, Promises Coherence

Mr. Trump, the front-runner for the Republican presidential nomination, pledged a major buildup of the military, the swift destruction of the Islamic State

.. Mr. Trump was scathing about the Obama administration’s intervention in Libya, lashing Mrs. Clinton to the policy, which he said had left a security vacuum to be filled by the Islamic State.

.. “Our friends and enemies must know that if I draw a line in the sand, I will enforce that line in the sand — believe me,” Mr. Trump said. “However, unlike other candidates for the presidency, foreign aggression will not be my first instinct.” He did not mention anyone by name, though his leading Republican opponent, Senator Ted Cruz of Texas, has threatened to carpet-bomb the Islamic State until the desert sand glows.