We're going to be tracking several groups, places and people who will determine the U.S. Senate race. Keep an eye on the Dallas-Fort Worth suburbs, the heavily-Latino border counties in South Texas and the vote share that Libertarian candidate Ted Brown receives as returns come in, among other trends. And read more about what to watch for here.

Gabby Birenbaum is the Washington Correspondent for the Texas Tribune. She covers the Texas congressional delegation and the impact of federal policy on Texas. Gabby previously covered Washington for The...