A timeline of when AI could outperform humans

Attorney General Jeff Sessions suggested he could resign as tensions with President Trump rose, ABC News' Jonathan Karl reports. The NYT's Maggie Haberman later confirmed Karl's report, adding that Trump declined Sessions' offer. The source of the tension: Sessions' decision to recuse himself from the Russia probe, which he did not consult with Trump about ahead of time. Two sources close to the president say he lashed out repeatedly at the attorney general in private meetings, blaming the recusal for the expansion of the Russian investigation… but sources say the frustration runs both ways."