As incoming White House chief of staff, one of Susie Wiles' vexing challenges will be policing the buffet line of powerful interests who want something from Donald Trump. It's a world she knows well. During Trump's first presidency, she lobbied for many of them. Trump was first elected on a pledge to drain the swamp in Washington. But his transactional approach to the presidency instead ushered in a lobbying boom that showered allies, including Wiles, with lucrative contracts, empowered wealthy business associates and stymied his agenda after his administration was ensnared in a series of influence-peddling scandals. Now, as Trump prepares to return to power, his victory is likely to embolden those who think they can get his ear, raising the prospect that his second administration could face many of the same perils as his first. That will test the ability of Wiles to manage a growing number of high-powered figures including Trump's children, his son-in-law Jared Kushner and ...