Sweeping Republican party wins in U.S. Senate and strengthen their grip on the House of Representatives in a punishing blow to President Barack Obama that will limit his power in his last two years in office. Early futures prices (ESc1) pointed to a 0.3 to 0.4 percent gain for Wall Street when trading opens, while the dollar rose to as high as 114.59 yen (JPY=), its highest level since December 2007.