you last presidential nominees for the republican party just in the last week, mitt romney and johna mccain have come out and said no, we cannot as a party and as a country about donald trump to be our standard bearer. the republican party is really the one that is facing these demographic challenges. we will see how it plays out in the coming months but this is a long-term challenge. at some point it needs to address aspect passage from the book about hydro partisanship towards the beginning to arguably the most powerful force l force in the 21st century american politics, republicans democrats >> hostforce.e. >> guest: i'm not the first to observe this has been a very, very rancorous debate, that discourse has gotten bolder but beyond the bubble dirty it's very, very rancorous. i'm old enough to remember a political era where there was such a political creature as a conservative democrat and ali liberal republican. not only can't find those on capitol hill, you find fewer and fewer of those within the body politic. it is because the demographic changes in the country have made our politic