Ted Cruz on Saturday used his first speech since dropping out of the presidential race not to endorse Donald Trump or urge Republican unity behind him, but to maintain that core conservatives can save America. Trump, the presumptive GOP presidential nominee, countered by deploying a top surrogate who did his best to woo skeptical Texas conservatives. Addressing thousands of cheering delegates at the Texas Republican Convention, many of whom climbed to their feet and waved red-white-and-blue "Thank You Ted!" signs, Cruz repeated some of the same promises from his defunct White House campaign, like abolishing the IRS. "People ask, 'Are...