Underlying U.S. inflation pressures rose in November, which could give the Federal Reserve more confidence to raise interest rates on Wednesday, even as renewed weakness in gasoline prices kept overall consumer prices in check. The Labor Department said on Tuesday its so-called core Consumer Price Index, which excludes food and energy, gained 0.2 percent last month. It was the third straight month that the core CPI increased by that margin, and reflected rising rents, airline fares, new motor vehicles and healthcare costs.