tripp is probably well off and would be happy if taxes were lower targeting ads have long played an important role in campaigning. micro-targeting micro-targeting is constantly developing george w. bush used it during his 2004 campaign as it obama in 2008 and hillary clinton and donald trump and 2016. now you could argue that microtargeting is a good thing for instance i don't own a car so i don't care about new car. but what if that makes an algorithm think i'm not interested in any car related news what about exhaust fumes on you immobility technologies but knowledge is power and people should be able to choose what information they access plus they should be provided balanced views on social media this is all this is how it goes so impose a news item saying that muhammad is the most popular name in germany's capital berlin. different nation goes viral on social media and takes on new meaning which far right users think confirms their fear that germany has been flooded by foreigners. according to a new study almost half of the items posted in social media platforms lean towards the extreme

national political correspondent for the "new york times," alex burns, and cnn political commentator joe trippe. good morning to you. debating can be good for candidates. carr there are pitfalls, right. think of rick perry. famously could not name the three agencies he was going to knock down or the rubio/christie exchange. high stakes either in the positive or negative direction for candidates tonight. >> absolutely. look, i think most of the memorable moments in debates are ones in which a mistake happens. every once in a while, you get some momentum. that can happen. i think in tonight's debate particularly for some of the lesser known candidates, the amy klobuchar, senator from minnesota, tulsi gabbert, and mayor de blasio even from new york. they haven't gotten much attention. this is a big opportunity for them to finally get some. and for elizabeth warren, today this event that she's going to, this visit right now may be more important than the actual debate itself because again, she's already got a lot of that attention. >> yeah, certainly got the cameras there, right? with her today. wh