Us markets have their worst day since the president ial election as turmoil grips the white house. Plus alibaba goes west. Chinas 300 billion E Commerce Giant looks to america but can it take on its us rivals . Welcome to World Business report. Im sally bundock. Also in the programme, japans economy grows for the fifth quarter in a row has abenomics finally paid off . Well be live in tokyo for reaction. But first, we start on wall street where for months optimism about the trump presidency, the markets have been powering to record highs. But late on wednesday the trump bump turned into the trump slump as us stocks and the dollar suffered their worst day since before the election. The cause of the sell off . Growing concern that the president s promised tax cuts and pro business reforms may never materialise, as the white house battles one controversy after another. Lets show you the numbers. The Dow Jones Industrial average fell 372 points, and both the dow and s p 500 suffered their w