Marius Kloppers, chief executive of BHP Billiton, has seen two big deals fail since he became CEO. The hostile bid for Potash Corporation of Saskatchewan is riding on who woos Canadian regulators the best. Edward Hadas and Richard Stovin-Bradford of Lex discuss whether Mr Kloppers can miss out a third time. The Lex video is an experiment in financial journalism that aims to give you an insight into the debates that shape each day’s Lex column.