Tory Party leadership hopeful Michael Gove has insisted he is in the race to become the next prime minister "to win it" after his admission of cocaine use led to calls for him to withdraw. The Environment Secretary spoke of his regret at taking the drug in the 1990s, as the revelation continued to cast a shadow over him as he launched his bid for Number 10. Report by Blairm. Like us on Facebook at http://www.facebook.com/itn and follow us on Twitter at http://twitter.com/itn