The war of words between Prime Minister John Key and US journalist Glenn Greenwald has escalated with Mr Key calling Greenwald a "loser" and Greenwald accusing Key of changing his story every day. Speaking to Mike Hosking at the Newstalk ZB Breakfast this morning, Mr Key said he would have more respect for Greenwald if he had timed his visit differently. Greenwald is in New Zealand to present evidence he claims shows the GCSB was involved in mass surveillance at Kim Dotcom's 'Moment of Truth' tonight.