to expose the truth. >> now, representative gohmert there is holy mischaracterizing what the mueller report said and what the law is on obstruction. but it was a debate among house democrats whether or not to include an obstruction of justice article on the russia investigation against the president. in the end, sticking to ukraine for articles of impeachment was not a decision that house democrats made alone. one distinguished constitutional scholar in particular helped convince them that narrowly crafted articles would be the best way to go. why? let's bring in the man himself. professor lawrence tribe, also the coauthor of "to end a presidency: the power of impeachment." why tailor the articles of impeachment in such narrow fashion, why not say bribery not being more explicit? >> well, this is very explicit, and it's a much more serious crime than bribery. it's a crime against the