Barack Obama backs Hillary Clinton to guard his legacy

His own legacy on the line, US president Barack Obama implored Americans to elect Hillary Clinton to the White House, casting her as a candidate who believes in the optimism that drives the nation’s democracy and warning against the “deeply pessimistic vision” of Republican Donald Trump.

“America is already great. America is already strong,” he told cheering delegates at the Democratic convention on Wednesday night.

“And I promise you, our strength, our greatness, does not depend on Donald Trump.”