welcome back. you're watching msnbc. time for your primer, everything you need to know to start your day. president donald trump fired off a series of tweets surprise surprise after sally yates and james clapper testified o capitol hill. the president dismissed the russia investigation as a, quote, taxpayer funded charade saying the hearing provided no new information, but his tweets kept us talking about it. south koreans went to the polls to elect a new president after the former president was impeached in march for corruption. according to the exit polls liberal candidate moon jae-in appears to be the winner. >> remaining eight penn state students scheduled for arraignment for involvement in the death of sophomore tim piazza after a fraternity pledge party. eight members were charged on friday with involuntary manslaughter, aggravated assault and hazing. phoenix police say they have arrested the man responsible for