mr. cain had all of the flip-flops in our nominee, one after another. if you are in iowa, people want to make sure our nominee is 100% pro-life. >> reporter: all this big earring cording to analysts could actually split the conservative vote. good news for mitt romney. neither spent a lot of money or time in iowa and some are wondering whether he could win the caucuses in iowa. david kerley, abc news, washington. >> what is so interesting about this -- with the economy the way this is, a lot of political analysts said that this election is going to be about economic issues, unemployment, stock market regulation, always goes back to social issues, gay marriage, abortion, the themes come up again and again. >> this country loves a cultural wedge issue, what you named, classic ones. election season. hear a lot more. just wish herman cain would pick a side and stick to it. can't figure out what he is trying to say. the one who sparked the latest round of debates. shifting gears now to conrad murray trial, the prosecution's star witness returns to the stand today after bringing jurors to their feet. dr. steven schaefer held a bottle of propofol and iv bag showing the court