WASHINGTON: Barack Obama expressed hope on Wednesday (Thursday in Manila) that Bernie Sanders in “the next couple of weeks” will finally concede having lost the Democratic presidential nomination to Hillary Clinton, despite having vowed to fight on through the party’s convention next month. Speaking to late night talk show host Jimmy Fallon, Obama said that on balance, Sanders’s candidacy in the hardfought Democratic campaign was a positive. “It was a healthy thing for the Democratic Party to have a contested primary,” Obama told Fallon during recording of an episode of The Tonight Show. “I thought that Bernie Sanders brought enormous energy and new ideas. And he pushed the party and challenged them. I thought it made Hillary a better candidate.” He added: “My hope is, is that over the next couple of weeks, we’re able to pull things together.” The US president made his remarks one day after Clinton prevailed in four of six primary and caucus election contests, and declared herself to be her party’s undisputed flag-bearer for the November presidential election. Sanders has refused to concede defeat, and vowed to “continue the fight” for the nomination.