talks about the issue that will drive the campaign in 2015, and his conversations with yuval levin and neera tanden. >> this election like past elections, where again you -- is going to be about the future and who has the better answer to toe struggles families are facing and we live in cynical times, but both sides are going to have to bake through with real ideas. >> rose: cancer research and new ideas for the 2016 campaign when we continue. funding for charlie rose is provided by >> rose: funding for "charlie rose" has been provided by: >> rose: additional funding >> and by bloomberg, a provider of multimedia news and information services worldwide. captioning sponsored by rose communications from our studios in new york city, this is charlie rose. >> rose: an estimated 1.6 million new cases of cancer will be diagnosed in 2015, there is, however, increasing hope for those touched by the disease. advances in molecular biology and genetics are transforming prevention, detection and treatment of cancer, city of hope stay research and treatment center in duarte, california, it is focused on r

neera tanden is hillary clinton's recent advisor. a top aide in the obama white house.unning the center for american progress. she has been called the sugar ray robinson of policy mavens, as in pound for pound the best. we are pleased to welcome both of you. when we talk about the shrinking middle class, is it income inequality? how do you define it? >> mobility is the best way to think about it. both parties are coming around to rhetorically talk about mobility. for the democrats, that is a move from inequality to mobility. for republicans, from a abstract focus on growth. it remains largely to be seen how that will apply to policy. inequality is a good way to understand what is happening economically. it distorts more than it clarifies. growth is not enough. it is a prerequisite but not the sum and substance of what the middle class is missing. >> i think all those problems are a challenge. i'm good with the answer. social mobility, stagnant social mobility, is a challenge. i think we are suffering from massive inequality. what people are concerned about our stagnant