The U.S. Presidential race has reached a critical juncture. The Republicans have a confirmed nominee in John McCain; as for the Democrats, Hillary Clinton has bounced back, while Barack Obama retains a marginal lead in terms of delegates. How the presidential race evolves will be shaped in part by the increasingly worrisome state of the U.S. economy. Consumer prices are rising, oil has crossed $103 a barrel and gold is nudging $1,000 an ounce — suggesting that the economy could be entering a phase of 1970s-style stagflation. Fed chairman Ben Bernanke, however, told Congress last week that he doesn’t anticipate stagflation, and he continues to indicate his willingness to keep cutting interest rates. What lies ahead for the U.S. and world economies? Knowledge@Wharton discussed these questions and more with finance professor Jeremy Siegel, author of The Future for Investors.[youtube http://www.youtube.com/watch?v=WeDUeIBomzM&rel=1&border=0]