The drive to overhaul U.S. immigration law may get a high-profile boost next week, just as House Republicans begin to consider their legislative options, when former President George W. Bush addresses the matter at an immigration event at his presidential library. Mr. Bush, whose own effort as president to pass an immigration bill failed, rarely addresses current policy debates, but he has made clear that he supports the renewed effort this year. On Wednesday, he will address 20 new citizens as they are sworn in at the George W. Bush Presidential Center. Three panel discussions will follow on the topic...