Biden blasts Trump's 'narcissism' in new phase of campaign

Joe Biden mounted one of his most aggressive attacks against President Donald Trump on Tuesday, deriding the commander in chief's disregard of core constitutional values and blistering him for being "more interested in power than in principle."

"He thinks division helps him," the presumptive Democratic presidential nominee said in a speech at Philadelphia's City Hall. "This narcissism has become more important than the nation's well-being."