During the 2008 Democratic presidential primary campaign , Clinton vigorously advocated on behalf of his wife , Hillary Clinton . Through speaking engagements and fundraisers , he was able to raise $ 10 million toward her campaign . Some worried that as an ex-president , he was too active on the trail , too negative to Clinton rival Barack Obama , and alienating his supporters at home and abroad . Many were especially critical of him following his remarks in the South Carolina primary , which Obama won . Later in the 2008 primaries , there was some infighting between Bill and Hillary 's staffs , especially in Pennsylvania . Considering Bill 's remarks , many thought that he could not rally Hillary supporters behind Obama after Obama won the primary . Such remarks lead to apprehension that the party would be split to the detriment of Obama 's election . Fears were allayed August 27 , 2008 , when Clinton enthusiastically endorsed Obama at the 2008 Democratic National Convention , saying that all his experience as president assures him that Obama is " ready to lead " . After Hillary Clinton 's presidential campaign was over , Bill Clinton continued to raise funds to help pay off her campaign debt
2008 Democratic National Convention
2008 Democratic National Convention
Bill Clinton