Tuesday on the NewsHour, officials who were on President Trump's July 25th phone call with the Ukrainian president testify publicly for the first time. Plus: Rep. Mike Johnson, R-La., and Rep. Pramila Jayapal, D-Wash., members of the House Judiciary Committee, share their reactions to the testimony, Charlayne Hunter-Gault reports on countering the rise of white nationalism in schools, and more.