Clinton's 2016 White House launch contrasts with her 2008 bid

By Jonathan Allen and John Whitesides NEW YORK/WASHINGTON (Reuters) - Hillary Clinton cast herself as a champion for everyday Americans on Sunday, kicking off her long-awaited second run for the White House with a vow to fight for a level playing field for those recovering from tough economic times. Clinton, who begins the 2016 presidential race as the commanding Democratic front runner, entered the fray with a flurry of video, email and social media announcements that indicated she had absorbed