new york president barack obama say wednesday hop divisions democrats would start heal come weeks former secretary state hillary clinton clinch party nomination nov. presidential election hope next couple weeks able pull things together obama say first public remark since primary election win tuesday california elsewhere propel clinton victory rival bernie sanders hard-fought months-long campaign happen primaries get little ouchy obama tell nbc late-night host jimmy fallon tap tonight show set air thursday sanders concede race set meet obama white house thursday 11:15 a.m. 1515 gmt late fundraiser central park west apartment kenneth venture capitalist chairman buzzfeed medial company obama say worry bruise feel leave primary end sort end primary season obama say catch mistake crowd 60 democratic donors pay 33,400 attend laugh nervously concern us hard nuts-and-bolts work turn people vote particularly young people particularly low-income people obama say ask whether obama think sanders u.s. senator vermont quickly end campaign white house spokesman josh earnest say senator earn right make decision course campaign party officially vote clinton nomination convention philadelphia end july obama tell fallon healthy thing democratic party contest primary praise sanders enormous energy new ideas bring campaign push party challenge think make hillary good candidate obama say white house say obama popular among democrats play unify role campaign trail main role go play process remind american people serious job reality tv obama tell fallon swipe presumptive republican nominee real estate magnate donald trump star reality television show obama hop quick party heal 'ouchy democratic primary