Executive Communication In global speech, Obama strives for common ground Employs oratory tactics to reach an adversarial audience and call for an end to interfaith rancor. By John WatkisJune 5, 2009 SHARE To read the full story, log in. Become a Ragan Insider member to read this article and all other archived content. Sign up today Already a member? Log in here. Learn more about Ragan Insider.