other speakers include south carolina governor nicki hailey and lindsey graham and jim demi demint. 80 p.m. eastern tomorrow on c-span. >>> even though job opportunities are scarce in this economy, it's not for nothing that you have spent this time preparing. you don't determine a man's greatness by his talent or wealth as the world does, by rather what it takes to discourage him. america needs your talent and skill. >> don't accept somebody else's construction of the way it ought to be. it's up to you to right wrongs. it's up to you to point out injustice. it's up to you to hold the system accountable. and sometimes upended entirely. it's up to you to stand up and to be heard, to march, to organize, to vote. don't be content to just sit back and watch. >> president obama and mitt romney delivered commencement addresses in the past few days. you can watch them online any time at the c-span video library and over the next few weeks look for other commencement addresses on the c-span networks which you can clip and share. >>> the food commissioner michael taylor talked about food contam