John Allison, former president and CEO of the Cato Institute, says the Federal Reserve made mistakes in monetary policy that had severe consequences. Prior to that, Jim McCaughan, CEO of Principal Global Investors, says a weak banking system, particularly in Italy and Germany, will constrain European growth. Bob Sinche, Amherst Pierpont Securities' global strategist, says the pound will weaken to $1.20 later this year. Finally, Peter Feaver, a professor at Duke University, says the rollout of the ban on incoming refugees wasn't thought through and was ineffective.