President Trump said in his State of the Union speech on Tuesday that he prefers a diplomatic solution to the crisis with Iran, but at the same time laid out a case for a potential war against the Islamic Republic. Why it matters: Trump's remarks about Iran were relatively short and were not the center part of his speech, but it was the first time he detailed the reasons that led him to consider launching a military campaign. Trump's speech may mark the launch of an effort to prepare U.S. public...