Data: Harvard Youth Poll, Fall 2026; Chart: Emily Peck/AxiosNearly two in three U.S. adults younger than 30 who plan to vote in next month's congressional midterm elections say their main motivation is to oppose President Trump and his policies, according to a newly released Harvard Youth Poll.The big picture: Seventy-seven percent of respondents disapprove of the president's handling of the economy, including about half of young Republicans.