New Delhi, June 6 -- The last time Israel occupied this tier in an American counterintelligence document, Jonathan Pollard was still receiving suitcases of classified material at a parking garage in Arlington. Four decades later, the Defense Intelligence Agency has quietly returned Israel to the top of its threat register - raising its counterintelligence designation to "critical," the highest classification the agency assigns - and this time, the concern is not a rogue analyst selling secrets. It is the intelligence service of a formal ally conducting what current and former US officials describe as an unusually aggressive campaign to penetrate the internal deliberations of the Trump White House.

a sustained intensification of Israeli c...