Rancho Mirage (United States) (AFP) - US President Barack Obama has hammered home his belief that Republican White House hopeful Donald Trump would not be elected, knocking his reality show past and penchant for drawing media attention. Obama did not limit his criticism to the billionaire real estate tycoon, hitting out at "troubling" statements from the entire GOP field of candidates seeking to replace him. But he reserved his toughest remarks for Trump, offering a scathing assessment of why he thinks the American people will not elect him. "I continue to believe that Mr Trump will not be president. And...