washington republican presidential candidates may find subdue debate usual thursday night miami since nothing donald trump rival throw make major dent front-running campaign histrionics last week gather detroit four remain candidates likely search high grind offer close arguments republican voters particularly florida ohio vote next tuesday nominate contest nov. election burden particularly heavy u.s. senator marco rubio florida ohio governor john kasich must well home state face pressure exit race kasich hold trump ohio opinion poll rubio lag far behind trump florida trump victories michigan mississippi hawaii tuesday add momentum week attack mainstream republicans offend statements muslims women illegal immigrants alarm threats international trade deal trump defend call tough u.s. stance free trade thursday say unite state take advantage negotiations countries also cite currency devaluations particular problem like free trade represent good smart cunning people trump say interview cnbc countries take advantage tough-talking billionaire businessman tell cnn wednesday expect debate nice soft light debate hope add ready one beat hillary reference democratic presidential front-runner hillary clinton tone could set trump 69 forecast several previous debate would take measure approach quickly get verbal brawl rival cnn-hosted debate hold university miami 8:30 p.m. 0130 gmt friday would focus positive uplift message take us back run president stake election say eric fehrnstrom senior adviser 2012 republican nominee mitt romney detroit last thursday trump come sustain fire rubio 44 part business empire trump university now-defunct venture critics say offer flimsy education u.s. senator ted cruz texas pile trump past support democratic cause trump blast rubio throughout debate lightweight cruz liar trump-rubio debate clash detroit follow abrupt change rubio campaign begin raise personal question trump say small hand statement trump saw reference penis size rubio say regret personal insult term things personal stuff yeah end day something entirely proud kid embarrass rubio tell msnbc wednesday cruz 45 would like knock rubio kasich race could draw support anti-trump republican voters seek use debate position best trump alternative trump clearly try reach little statesmanlike say cruz backer saul anuzis former chairman michigan republican party cruz go make case beat trump viable alternative perspective think two-man race one path rubio fight survival face something last stand florida rival campaign say rubio may feel need return optimistic message stick months get sidetrack trump rubio tell fox news wednesday campaign always go come win florida nominee win florida republican nominee win florida say kasich rubio cruz one shoot deny trump nomination prevent assemble require 1,237 delegate win nomination outright would mean delegate would choose nominee july 18-21 convention cleveland trump say cnn wednesday 1,237 artificial number enter convention delegate rival nominee vow wage war party deny nomination convention kasich 63 say possible republicans contest convention emerge unite go convention come unite absolutely tell fox news town hall wednesday report steve holland additional report megan cassella edit peter cooney bill trott article fund part sap independently create reuters editorial staff sap editorial involvement creation production republicans may generate less heat miami debate