The party hopes to build on the momentum that Kamala Harris has brought since joining the race a month ago. Walz, the Minnesota governor, has become known among supporters as a folksy, Midwestern teacher, football coach and dad.
https://www.pbs.org/newshour/politics/democrats-convention-hits-third-day-with-tim-walz-and-bill-clinton-focusing-on-fight-for-our-freedoms