Hillary Clinton has insisted that her ex-President husband Bill Clinton was a "wonderful" asset after he made his own headlines by wading into the rough-and-tumble on the campaign trail."I am so happy he is helping me in this campaign," Hillary Clinton said, when asked whether the former President was a positive influence on her presidential hopes."He obviously counsels and advises me every single day," she told reporters during a conference call. "It's wonderful, I am thrilled to have his support."Bill Clinton leapt to his wife's defence this week as she endured fierce attacks from Democratic rivals, reopening the debate about whether he will end up helping, or hindering her 2008 White House campaign.The former President, who has been campaigning for his wife in the crucial state of Iowa, took the blame Thursday for the notorious failure of the healthcare initiative, which she managed in his White House.He also spoke out after she came under attack for a confusing answer in a campaign debate last week, warning Democrats should not allow Republicans to smear them.Other Democratic candidates have started to turn their fire on the former president.Illiois Senator Barack Obama, who trails the former first lady in the polls, was quoted by ABC News as saying, "My understanding is that Clinton is not on the ballot."Bill Clinton remains wildly popular among grass-roots Democrats, and is a key surrogate, fundraiser and strategist, for his wife's campaign.