Trump says US held 'all-day negotiation' with Iran on Tuesday

By Kanishka Singh and Bo EricksonWASHINGTON, Aug 4 (Reuters) - U.S. President Donald Trump said there was an "all-day negotiation" on Tuesday with Iran, characterizing the talks positively while also threatening to hit Iran "really hard" if a deal with Tehran was not reached.DETAILS AND QUOTES:• "They had an all-day negotiation," Trump told Fox News' "@ Night with Trace Gallagher" show.• "We are having very good discussions," he added.