U.S. Rep. Vicente Gonzalez, a Texas Democrat who represents a slice of the Rio Grande Valley along the border with Mexico, won his last congressional election by just over 5,000 votes.

Fateh won more than 60% of the delegate vote during a long convention at Target Center, finishing ahead of Mayor Jacob Frey.

In 2003, just three years after the decennial census, Texas Republicans developed a proposal to redraw that state’s congressional boundaries so provocative it caused 52 House Democrats to charter a ...