angelica alvarez reports. >> reporter: house speaker paul ryan announced he will not seek re-election so he can spend more time with his family. >> if i'm here for one more term, my kids will only have ever known me as a weekend dad. um, i just can't let that happen. >> reporter: the 48-year-old representative from wisconsin leaves congress with accomplishments including major reform of the tax code. today, mr. trump tweeted: speaker paul ryan is a truly goodman. he will leave a legacy of achievements that nobody can question. but ryan's decision to step away from congress comes at a time when republicans face uncertainty on winning seats during the midterm elections. >> i really do not believe whether i stay or go in 2019 is going to affect a person's individual race for congress. >> reporter: ryan served nearly 20 years in the house and is one of the youngest to be elected speaker of the house. in a closed-door meeting today, he received a standing ovation from colleagues and even cried. >> he leaves a tremendous legacy and he achieved his ultimate career goal of comprehensive tax f

cbs reporter angelica alvarez on the president firing back. >> reporter: president trump weighed in on fbi raid of the new york office and residence of his long time attorney, michael cohen, late monday calling the decision a witch hunt. >> they broke into the office of one of my personal attorneys, good man, and it's a disgraceful situation. >> reporter: federal investigators carried out the raids as part of a referral by the office of special counsel robert mueller, a person familiar with the matter confirming to cbs news agents seized documents and other materials adding that a court warrant authorizing the raid was obtained. in a statement cohen's attorney called the warrant completely inappropriate and unnecessary. it's not clear if investigators are specifically interested in one aspect of cohen's involvement in the 2016 election or of his payment of $130,000 to adult film actress stormy daniels. cohen admitted to paying daniels to keep quiet about an affair with president trump in 2006. she talked about her alleged affair with the president in a 60 minutes interview with anderso

angelica alvarez reports he's citing a surge of illegal activity in the area. >> reporter: presidenttrump traveled to west virginia thursday leaving pentagon officials scrambling to answer questions about plans to send national guard troops to the southern border. >> once we know the requirement we'll move very quickly. >> reporter: federal law prohibits the u.s. military from acting as law enforcement and arresting illegal border crossers. the pentagon chief spokesperson dana white sought to clarify what the troop's role would be. >> efforts will include aviation, engineering, surveillance, communications, vehicle maintenance and logistical support. >> reporter: president trump has cited a drastic surge in illegal activity along the border as reason for this move. >> we have to have strong borders. we're going to have the wall. >> reporter: border arrests this year are down nearly 13% compared to last year, but according to the department of homeland security march saw a big spike with more than 37,000 arrests. >> we are at a crisis point. we'd like to stop it before the numbers get

angelica alvarez, cbs news, fbi headquarters in washington. >> the raids today stem from something uncovered by special counsel robert mueller's team. he then referred the case to prosecutors in new york for further investigation. >>> the other big story tonight, facebook's mark zuckerberg getting ready for some tough questions from lawmakers in washington. >> he's there to talk about the data scandal, his company accused of putting profits ahead of their users' privacy. our veronica de la cruz is here with zuckerberg making the rounds on capitol hill today. >> tomorrow zuckerberg plans to apologize and take full responsible for some major flaws and he has already been meeting face to face can key senators. mark zuckerberg arrived -- face to face with key senators. mark zuckerberg arrived for closed door meetings. some describe the ceo as forthright and willing to fix mistakes. >> my sense is he takes it seriously because he knows that there is going to be a hard look at regulation. >> zuckerberg will appear before three committees tuesday and wednesday to explain how political consulting fi