in this hour, kenneth rogoff and adam posen.aing is conversation with david lipton of the international monetary fund. and while hillary feels the burn, democrats and republicans non-debate as washington burns. this is "bloomberg surveillance ," friday, april 15. i am tom. with me, francine lacqua. francine, i give you immense credit. one of the backdrops to all of this is brexit. it is not just about the united kingdom. francine: it is not. the imf upgraded to one of the main risks. earnings, banks, that is another risk to the world economy. then currencies. tom: what a busy hour of international economics. now to your friday "first word news," here is caroline hyde. caroline: another t -- another casualty of the panama papers. .e resigns today he initially denied any involvement before backtracking. calls for the spanish industry beganer to resign yesterday. another blow to dilma rousseff. the country plus supreme court has rejected a motion to stop an impeachment vote against her scheduled for sunday. it is the latest defeat