By Amanda Becker and Luciana Lopez PHILADELPHIA (Reuters) - Hillary Clinton secured the Democratic Party's White House nomination, coming back from a stinging defeat in her first presidential run in 2008 and surviving a bitter primary fight to become the first woman to head the ticket of a major party in U.S. history. In a symbolic show of party unity, Clinton's former rival, U.S. Senator Bernie Sanders of Vermont, on Tuesday told the chairwoman from the convention floor that Clinton, 68, should be selected as the party's nominee at the dramatic climax of a state-by-state roll call at the Democratic convention in Philadelphia. Capping nearly a quarter century in public life, Clinton will become the party's standard-bearer against Republican nominee Donald Trump in the Nov. 8 election when she accepts the nomination on Thursday.
President Barack Obama has refused to rule out the possibility that Russia is trying to sway the US presidential election in favor of Donald Trump. "Anything is possible," Obama told NBC News in an interview due to air Wednesday -- the furthest the US government has gone in pointing the finger at Russia for a vast release of Democratic National Committee emails by WikiLeaks. Russia has dismissed the allegations it was involved as "absurd".