The heads of the Pentagon and the nation’s intelligence community have recommended to President Obama that the director of the National Security Agency, Adm. Michael S. Rogers, be removed. The recommendation, delivered to the White House last month, was made by Defense Secretary Ashton B. Carter and Director of National Intelligence James R. Clapper Jr., according to several U.S. officials familiar with the matter. Action has been delayed, some administration officials said, because relieving Rogers of his duties is tied to another controversial recommendation: to create separate chains of command at the NSA and the