warrington where visited middle schools to honor seventh graders for the winning videos industries studentcam competition. you can view all the winning documentaries that studentcam.org. >> guest: we are back with dave bossie, president of citizens united. we were discussing donald trump. you are friends with him. you have known for a long time have k but let me ask you this. long ti can to unite the republican party like the rnc chairman aince priebus asked the republo republican to do and get behind donald trump? >> guest: i think he will. i think it's a pretty. it's a moral imperative for every republican in the country whether you supported donald trump or the cou not. there was many, many of my friends who did not but they will come around because i just b hark back to 2012 and 2008 and 2000 when i was on the receiving end of the phone calls that said you did not support mitt romney on the primary process. you did not support john mccain in the primary process which i did not. i then came around and supported him. i was not for donald trump in this primary process. i was not against them

. ♪ >> to watch all of the prize-winning documentaries in this year's studentcam competition.isit studentcam.org. announcer: the white house correspondents dinner is one of ine biggest events held washington, d.c. this year, the audience heard president obama give his final correspondents dinner speech as president. they also heard from larry wilmore. we'll show you the event beginning with the red carpet arrivals. al white house correspondents dinner. 2700 correspondents and guests will gather in the 30,000 square foot hilton ballroom tonight for dinner, speeches, jokes and networking. and c-span will be live through it all, beginning with the arrival at the hilton, which you are watching right now. if you would like to make a comment while you are watching, go to facebook.com/cspan, or follow us on twitter using the hashtag, the view ages cd -- whcd. now we will watch the early arrivals who are on their way to the reception, sponsored by different media organizations. the dinner itself will begin at 8:00 p.m. eastern time. [chatter] [lots of chatter] >> hello, hello. >> live

campaign 2016 bus continues to travel throughout the country to recognize winners from this year's studentcamcompetition. recently the bus stop in massachusetts to visit several winning students from the state. they would to folks were all the students at first through eighth grade attend a full similar to honor seventh graders. for the honorable mention video jerk the bus made a stop to recognize i will mention winners, eighth graders. a special thanks to our cable partners comcast cable and charter communications for helping to coordinate these visits. you can get all the winning documentaries at studentcam.org. >> president obama traveled today to hiroshima, becoming the first sitting u.s. president to visit a japanese city where the is dropped an atomic bomb august 6, 1945. here's a few minutes of the president's remarks. >> the united states, japan forged not only an alliance but a friendship, that has won far more for people than we could ever claim through war. the nations of europe built a union that replaced battlefields with bonds of commerce and democracy. oppressed peoples and nat

campaign 2016 bus continues to travel throughout the country to recognize winners from this year's studentcam competitions. the bus stopped in massachusetts to visit several winning students. they went to the state school in foxboro were all the students attended a school ceremony to honor seventh graders. the bus made a stop to the middle school to recognize honorable mention winners. >> a special thanks to our cable partners comcast cable and charter communications for helping coordinate this. you can view all the winning documentaries at studentcam.org. >> the u.s. senate gathers today following morning business. lawmakers will resume debate on h.r. 2577 that combines transportation and housing spending bill for military construction. these are the second and third appropriation bills the senate is considering this year. yesterday on this and for those discussion on the vacancy on the supreme court. these comments are about one hour. >> i rise to discuss the pending vacancy on the united states supreme court, and i do so on a very woman does a day in american legal history. 17, may 17 toda

we visited tamminen middle school for their winning videos and the studentcam competition.tners things to our comcast and armstrong cable. you can see all the winning document as it studentcam.org. washington journal continues. week in this segment of the washington journal, we take a look at how your money is at work in a different federal program. we are joined by richard rubin who is a tax policy reporter with the washington -- explainrubin, first what a tax gap is. guest: it is the difference between taxes owed and taxes collected. it is how much unpaid, uncollected taxes there are out there. these are federal taxes, that is a one-year number. to put it in perspective, the government collects over $3 trillion a year. as of this is a gap on top of that. that means the government collects 80 to 85% of taxes now and leaves that other part uncollected. about 387 billion due to underreporting, 39 billion due to underpayment and 32 billion due to on filing. explain underreporting versus on paying -- underpaying and on filing. guest: underpayment is you know you are taxes and

our campaign bus continues to travel throughout the country to recognize winners from this year's studentcam competition. the bus stop in massachusetts. they went to the school where all students attended a school ceremony to honor seventh for their honorable mention video titled "gunning for safety." the bus also made a stop to recognize the honorable mention winners and their winning video called "veteran services." in front ofnored classmates, family members, and local officials receiving $250 for their winning video. a special thanks to our cable partners for helping to coordinate these visits in the community. you can view all the winning documentaries at studentcam.org. michaelsunday night, kinsley talks about his new book on living with parkinson's disease. >> parkinson's is a brain disease, so that was a nonsensical question. but what i really meant thinking, is it going to affect my thinking? thinking is how i earn a living, so that became pretty important. numerologist -- neurologist what is going to happen. he was trying to tell me it was not such a big deal. edge,d you may lose y