(RECAP: Efforts by the Treasury to sell bonds due in more than 30 years would face obstacles as the Federal Reserve begins raising interest rates from a record low, according to dealers that underwrite U.S. debt sales. The Treasury asked the Fed’s 22 primary dealers today to comment on demand for such securities. The question came amid a bond rally this year that surprised traders who began 2014 forecasting higher yields as the economy improved. The U.K. and Canada have sold 50-year bonds.)