The prestigious Brookings Institution has placed its president, retired four-star Marine Gen. John Allen, on administrative leave amid a federal investigation into Allen’s foreign lobbying. Brookings’ announcement came a day after The Associated Press reported on new court filings that show the FBI recently seized Allen’s electronic data as part of an investigation into his role in an illegal foreign lobbying campaign on behalf of the wealthy Persian Gulf nation of Qatar. Allen has not been charged with any crimes and previously denied any wrongdoing. Brookings told staffers Wednesday that the institute itself is not under federal investigation.