promise u.s. republican front-runner donald trump adopt presidential campaign style signal retreat core policies pledge build wall mexican border top adviser say sunday senior trump aide paul manafort dismiss rival republican candidate ted cruz accusation real estate mogul lie policies immigration fool gullible voters tussle trump style substance precede tuesday republican democratic nominate contest pennsylvania four northeastern u.s. state next chapter 2016 drawn-out selection candidates november presidential election cruz seize manafort comment closed-door meet top republican officials florida thursday trump 69 would temper image project far say part play evolve never say trump go build wall never say trump go change position manafort say fox news sunday adviser say cruz 45-year-old u.s. senator texas trump close rival try distract voters difficult path nomination ohio governor john kasich 63 also vie republican candidate despite manafort promise restrain tone trump continue employ insult nickname rally saturday refer cruz lyin ted billionaire new yorker alarm senior party figure unflattering descriptions mexicans pledge immediately deport millions illegal immigrants propose temporary ban muslims enter country among things rhetoric draw protesters trump rally sometimes culminate scuffle sunday connecticut state police arrest 20-year-old man say post threat twitter bomb upcoming trump rally tuesday one week trump crush win new york primary election pennsylvania maryland delaware connecticut rhode island hold primaries democratic front-runner hillary clinton campaign say former secretary state essentially insurmountable lead rival bernie sanders 74-year-old u.s. senator vermont plan drop race accord staff count defy pollsters surprise win tuesday trump work accrue 1,237 delegate july 18-21 republican national convention need win nomination outright would avert contest convention cruz kasich dark-horse establishment figure could win nomination second subsequent ballot manafort predict trump would win nomination first ballot cleveland convention trump already least 844 delegate commit accord associate press cruz 543 kasich 148. five northeastern state 118 delegate stake pennsylvania also choose 54 delegate bind candidate trump state overall cruz texan try keep trump win need delegate use selection rule vary state colorado example delegate pick without popular vote try say process matter try say vote matter manafort say cruz sunday try say matter destroy party see pick piece second third fourth ballot go let happen manafort say state nominate contest continue june also sunday republican national committee chairman reince priebus play conservative billionaire charles koch comment possible clinton 68 would make good president republicans race charles past go way make case little bite less partisan people would expect priebus say abc go come four eight years barack obama hillary clinton different direction priebus say think go powerful case go able make party democrats include clinton criticize koch brother david koch use wealth huge fund network help organize support politicians usually republican ones reflect opposition government regulation industry clinton campaign please koch faint praise response koch comment post clinton twitter account say interest endorsements people deny climate science try make hard people vote toned-down trump mean retreat policy aide