Hillary Rodham Clinton will bring America "back to the future," husband Bill says, promoting his own legacy in public life almost as much as his wife's presidential campaign. "I think she has proven in all these debates, and especially the last one, that she is the strongest, most reliable person that we could elect," the former president told more than 400 potential voters at a YMCA gym. "And I say that as an admirer of the rest of the candidates. I like this field." Clinton's visit marked the start of a battle of campaign surrogates - Clinton vs. Winfrey, the former president stumping for his wife and media mogul Oprah Winfrey backing Sen. Clinton's chief rival, Barack Obama, in appearances scheduled for next week.