gary segura, a stanford university political scientist, polls latino voter attitudes.e says it all comes down to numbers and history. >> democrats cannot get elected to national office without a super-majority of african american and latino votes. that's been true for a long time. democrats have not won a majority of the white vote since 1964. what's happened over the course of, say, the last 20 years is that the number of states where latino voters are able to tip the balance has grown from being, say, just california in the mid-1990s to now including places like nevada, colorado. in the last election, indiana and north carolina are places where the margin of victory among latinos was larger than the margin of victory statewide. >> ifill: a sore spot for republicans-- tough talk on immigration that rejects citizenship and focuses on law enforcement. >> the right course for america is to drop these lawsuits against arizona and other states that are trying to do the job barack obama isn't doing. i will drop those lawsuits on day one. i'll also complete the fence. and i'