Fiona Hill , Trump’s former top Russia adviser, said in a startling deposition Monday that then-national security adviser John Bolton told her to tip off White House lawyers about the activities of Giuliani and others, according to sources familiar with her testimony. Bolton’s advice followed a meeting two weeks before the call between the two presidents on July 25, one source said. The detail suggests that senior figures inside Trump’s White House were deeply concerned that the activities by the President and those close to him could reach the level of illegal behavior — a potentially significant turn in the three-week-old impeachment inquiry by House Democrats. While it remains unclear whether Trump or his lawyer Rudy Giuliani did actually break the law in going around official channels to deal with Ukraine, much of the conduct now emerging at least appears unethical, off-the-books of regular diplomatic activity and more expansive than it initially appeared. It adds to a growing tapestry of evidence that suggests that the call between the US and Ukrainian Presidents and a whistleblower account of behind-the-scenes activity in the White House represents just the tip of the iceberg of what may have been going on. According to sources…