U.S. Senator Warren makes push on middle-class issues

U.S. Democratic Senator Elizabeth Warren, who has so far brushed aside calls to seek the presidency, launched a campaign on Tuesday to tackle middle-class issues expected to be prominent in the 2016 election and promised to be a "loud" voice in the debate. Warren, a long-time consumer advocate who is often mentioned as a potential White House candidate, said the project was aimed at promoting policies to shift Washington away from corporate lobbyists and instead address education, wage