Any one of the problems we face—energy prices, housing, inflation—by itself wouldn't break our back, says John Mauldin, co-founder of Mauldin Economics and one of the most brilliant minds in macroeconomics. But all of them coming together could create a serious crisis. Show host Ed D'Agostino and John discuss what the looming global debt crisis could mean for your portfolio... the disconnect between energy policies and energy needs... and why the Fed needs to "drive a stake through the heart of inflation." For more of John Mauldin's macroeconomic insights, click here to subscribe to his free weekly e-letter, Thoughts from the Frontline. Don't miss this week's episode of Global Macro Update—listen now!