. >> maybe we should biotic starbucks. i don't know. seriously. >> reporter: on the eve of the fourth republican debate, donald trump sought to win over christian evangelicals in illinois angry over a decision by starbucks to replace its christmas themed cups with what the company calls a simple red design. >> if i become president, we all will be saying perichristmas again, that i can -- merry christmas, that much i can tell you. >> reporter: despite looming questions over carson's personal story, in an appearance monday on fox news the former neurosurgeon fired back against the media for vetteding claims he has anger issues as a child. >> i would much rather lose an election than to lie. >> reporter: carson and marco rubio are getting a boost from a new mcclatchey marist poll. unlike trump, more republicans hear about both candidates, the more they like them. >> in this election, we are not just choosing the next president, we are choosing an identity in the country in the 21st century. >> tonight's debate will be in scott walker's bac