washington republican presidential front-runner donald trump make surprise closed-door visit republican national committee thursday tumultuous two days campaign trail include reversal pledge support party nominee trump also struggle contain fallout wednesday comment women abortions punish procedure outlaw say afterward nice meet talk party unity rnc chairman reince priebus look forward bring party together trump say twitter happen priebus say meet schedule days ago include discussion process head party july convention cleveland trump lead republican race risk fall short 1,237 delegate need become party nominee nov. election raise prospect contest convention talk unity work together make sure go cleveland come cleveland work direction priebus tell fox news channel trump relationship rnc contentious time recently complain party treat fairly prepare possible contest convention tuesday trump back away loyalty pledge sign september promise support party eventual nominee run independent campaign white house rnc pledge unravel trump remain rival u.s. senator ted cruz texas ohio governor john kasich also indicate unlikely observe pledge trump nominee priebus refuse say discard loyalty pledge discuss meet trump last hour billionaire businessman washington morning gather newly establish foreign policy team source attend say group discuss threats islamic state militants nuclear proliferation homeland security assessments european security level trump campaign also announce set washington office run convention delegate operations work rnc congress campaign busy try dig avalanche criticism trump abortion comment even though quickly reverse stance trump pull back initial comment within hour first statement say u.s. state handle abortion issue late say doctor perform abortions ones hold responsible presidential candidate clarify record twice trump spokeswoman katrina pierson tell cnn call initial comment simple misspeak say trump pro-life exceptions say statements comment msnbc interview accurate depiction view make 24-hour headline things like terrorism go world trump late controversy threaten erode stand women voters many offend use vulgarities insult language describe women campaign abortion flap erupt trump campaign wisconsin ahead state primary tuesday primary particularly important 42 delegate award winner popular vote rather distribute proportionate vote two opinion poll release last two days show cruz move ahead trump 10 percentage point wisconsin trump meet new foreign policy advisers follow several controversial statements national security issue prompt critics question suitability commander chief trump declare nato obsolete say saudi arabia dependent unite state say japan south korea may need develop nuclear program u.s. security umbrella costly maintain msnbc town hall make abortion comment trump refuse rule potential use nuclear weapons europe middle east combat islamic state militants would never take card table say trump tell fox news channel nuclear issue discuss foreign policy meet everybody agree take table many establishment republicans labor block trump get nomination july convention worry lead party overwhelm defeat november trump republican rival say abortion comment another example raise question suitability white house show really prepare president unite state kasich tell reporters new york news conference add president constantly row back series wild-eyed suggestions tell commander chief leader free world get do-overs need able get right first time say trump meet republican leadership party unity discuss