Trump, Bloomberg trade schoolyard taunts as spending war heats up

U.S. President Donald Trump and Democratic presidential candidate Mike Bloomberg traded withering taunts on Sunday, in an exchange that suggests the Bloomberg campaign is willing to fight Trump's notorious insults head on.Trump's remarks to FOX News Channel's Sean Hannity, coupled with a series of Twitter posts late on Saturday, also indicate the president is keeping a wary eye on the billionaire and former New York City mayor as a potentially tough competitor who has the funds to outspend him.A