kuhn? neil: well, he was a historian of the history of science who wrote that disciplines are periodically transformed by sudden paradigm shifts, for instance, when copernicus suggested that explaining planets as revolving around the sun could simplify and improve explanations of how the universe worked. brian: let me finish that quote, "as thomas kuhn predicted in the structure of scientific revolutions, all disciplines of learning are periodically transformed by great works of interpretation, capable of producing a paradigmatic shift in thinking. i think generations is such a work in american history." why all of a sudden has the word "paradigm" become so used in this town? william: well, people are looking for a new way to connect themselves to the larger story of america. that is the problem. we've felt adrift over the past 10 years, and we think that the way history has been presented over the past couple of decades has been more in terms of the little pieces and people are not as inte

senator kuhn took issue with a couple comments we made. let me just read to you. i know you love when i do this. senator kuhn. this is his direct quote. quote, i have no hard evidence of collusion end quote. director clapper, quote, not to my knowledge. end quote. senator tom cotton, quote, not that i have seen and not that i'm aware of. this is regard to any type of collusion with russia. obam cia director, quote, there's smoke but no fire. senator grassley, i can say potus and at clapper are both right, no evidence of trump collusion. we've now gone over this on multiple occasions. but at some point there's a distinction between an investigation that goes into russia's involvement in 2016 and this continued narrative that falsely tries to link the trump, the president or the white house into any of it. they continue to see that there is nothing there. every sinle person who has been briefed who has come out and talked about it, republican, democrat, former dni, former cia director, obama appointees have said no evidence. and so i get that we keep getting asked -

melissa kuhns, "nightly business report." >>> after years of research, alzheimer's, millions of americans are thought to have that disease. >> that number is expected to triple by 2050. as we reported yesterday, there is a debate within the medical community over the best way to target the disease, tonight as part of our modern medicine series, meg terrell looks at some new approaches to alzheimer's. >> what goes wrong in the brain, alzheimer's is one of the great mysteries of new medicine. new mystery may shed light on the problem. >> two membranes comparing billions of neurons and other supporting cell types and this neurons make trillions of masses with each other to form an intricate brain circuit or network. much like a computer. but more powerful. >>. rond studying those newing as is making research. >> one productivity in our brain is a large number of connected neurons can fire synchronously together to produce this rippled oscillations or waves of different frequencies. >> one frequency known as gamma is associated with higher order brain functions, perfection, attention and the

. >> reporter: agent in charge eric kuhn shows us areas where his team has noticed illegal crossings. >> you can see that dark line right there, kind of where the land under ewe lates, that's the border. stick to the fat path. waist-deep snow. >> reporter: this shuttered port of entry has become the main artery for foot traffic. >> that's where it parallels the border, spans across here. >> reporter: as nightfalls in canada, so do temperatures. in emerson, manitoba, a watchful eye on the border. >> wearing their winter jackets, boots. they were cold. >> reporter: the emerson inn, the first refuge for many crossers. >> i give them food, coffee, and then i shelter them. >> reporter: in quiet moments of introspection, growing concern over canada's acceptance of refugees. >> do we need it? no. do we want it? no. are we going to do it? probably yes. >> i'm at an age where i'm getting close to retirement. and unfortunately, when they come here and apply for refugee status, they're getting more than i do as a canadian who's contributed to this country for 40 years. >> reporter: on this night

and they want a special outside counsel appointed to conduct the investigation, today, senator chris kuhns said he has seen no evidence with the trump campaign but there are nor questions that need to be answered. >> i have no hard evidence of collusion. i think what hard evidence there may be will be discovered either through a full release of president trump's financial interest and concerns and taxes or the intercept that i believe our fbi have in between and among russia official >> the white house hasn't given indication that it's considering an appointment of a special council. there are reports that president trump is upset his attorney general recused himself in the first place. president trump expected to sign a new immigration travel ban in law tomorrow. it's expected to ban travel from several middle eastern and african countries. a previous order signed in january is on hold by a federal court. >>> north korea is attempting to flex its muscles, they flew more than 600 miles. >> this group of kids might have a hard time falling asleep tonight after what they say they saw in the

fox news sunday democratic senator chris kuhn insisted on the judiciary foreign relations committee alsosaid he believed some of those questions about ties to russia would be answered without president trump releasing tax returns and argued the entire country should be more concerned about the connections to russia. reporter: senator sessions that i misspoke when i said i did not have communication with russians. whether or not that it's a willful misrepresentation or lie is something i think we should investigate. the attorney general ought to come back to the committee and answer questions so we can clear the air and get to the bottom of this. reporter: there were also calls for a special counsel to be appointed to the investigation, something republicans argue at this point there's nothing to suggest would be necessary. the white house is also pushing back the president trump was not happy as attorney general recused himself from the investigation. >> well, the president believes that jeff sessions is a good man and that he didn't do anything wrong. i certainly feel that he didn't fee

it was the most fiscally irresponsible speech given to congress since lbj's kuhns and butter.s not understand he's walking into a debt trap that is going to take him down within months. that's because the debt ceiling holiday ends march 15th. it goes back into law, the clock starts ticking. they are burning cash like there's no tomorrow. he said we lowered the debt by $12 billion. no, actually net debt went up $187 billion. the treasury burned $200 billion of cash while nobody was watching. when this clock starts ticking, they will be out of cash by june or july. there will be the mother of all debt ceiling crises. there is no pathway to a majority in the house to raise the debt ceiling. the freedom caucus will never vote for a debt ceiling increase if they haven't repealed obamacare, which isn't happening. it's long before you get a tax cut, any kind of infrastructure bill and what wall street is not understanding here is that it's falling apart on capitol hill. that speech was meaningless. >> president trump is an idea guy. in terms of details, if he doesn't get any of these