Iran's Rouhani calls for unity to face 'unprecedented' U.S. pressure

President Hassan Rouhani called on Saturday for unity among Iran's political factions to overcome conditions which he said may be harder than those during the 1980s war with Iraq, state media reported, as the country faces tightening U.S. sanctions.U.S. President Donald Trump on Thursday urged Iran's leaders talk with him about giving up their nuclear program and said he could not rule out a military confrontation.U.S.Trump made the offer as he increased economic and military pressure on Iran, m