Donald Trump has plucked one of the top congressional staffers on Capitol Hill to guide his policy on immigration and other important issues. Stephen Miller has served the last seven years as director of communications for Sen. Jeff Sessions, R-Ala., who has been the U.S. Senate's most reliably anti-amnesty member in recent years. Miller, 30, confirmed Tuesday he will be joining the Trump campaign as the billionaire's senior policy advisor. "I am excited to announce that I am beginning a new job as Senior Policy Advisor to presidential candidate Donald J. Trump," Miller said in an email. Ann Coulter, author...