washington u.s. president barack obama warn friday occupy oval office reality show swipe outspoken republican candidate donald trump vie replace white house fight obama battle trump would likely relish try rally support within party hard-fought republican primary campaign billionaire delight respond attack rival find support grow lash opponents ask trump media brief white house obama call press public weigh past statements republican point specific issue remark entertainment obama say reference trump television background reality show contest presidency unite state say top republican leaders u.s. house speaker paul ryan among still express wariness trump become party presumptive nominee week two republican rival drop white house race former florida governor jeb bush run unsuccessfully republican nomination post facebook vote trump one sharp slight yet new york real estate mogul senior republican donald trump demonstrate temperament strength character display respect constitution consistent conservative reason support candidacy bush write add would vote likely democratic nominee hillary clinton either u.s. senator lindsey graham south carolina make unsuccessful bid president join grow list republicans refuse support trump announce friday also skip republican convention july mitt romney republican nomination 2012 also refuse support trump trump friday endorsement another former republican presidential nominee bob dole lose bill clinton 1996. trump find unify enemies like obama hillary clinton could help rally republicans back side ahead nov. general election obama likely feature much trump criticism general election republicans seek paint clinton extension obama administration would continue policies since effectively secure nomination tuesday trump begin test theme attack clinton obama former secretary state friday trump take aim clinton use private email server office clinton say send receive information mark classify fbi investigate whether laws break email scandal take think go think protect democrats trump say fox friends television news program attract large conservative viewership trump try cast clinton weak economy sure one main policy issue election approach look go go bad job wag go go workers say early general election poll show clinton lead nationally key state clinton high probability trump become next president gap narrow week accord online political stock market predictit key factor trump general election whether rally party behind trump see top republicans previously fight candidacy back include texas governor rick perry former vice president dick cheney whose daughter liz cheney run congress wyoming say support trump source close say friday paul manafort top trump adviser tell msnbc republicans rally behind businessman strengthen party attract new supporters want unify party important thing remember donald trump historic victory among 17 candidates manafort say strong nominee vision lay something question republican national committee chairman reince priebus already begin efforts rally party behind trump say event host politico behind scenes candidate gracious personable think see rally think work tone priebus say add make point trump think get think go see think go see change tone addition change tone trump also face uphill climb bring party together ryan top elect republican unite state say thursday ready support trump sign linger establishment concern candidate position immigration trade trump take issue ryan paul ryan say inherit something special republican party trump write twitter wrong inherit millions voters ryan invite trump meet house representatives republican leaders next week ryan office say friday trump attorney quote media report friday say candidate testify november election class-action lawsuit accuse now-defunct trump university defraud people pay 35,000 real estate seminars federal judge order trial san diego start nov. 28 mean testify campaign university case one subject trump rival use attack presidential debate 'this reality show obama tell trump