The congressional seat held by Rep. Joe Barton, R-Texas, could become a political battleground if he chooses not to run.
The congressional seat held by Rep. Joe Barton, R-Texas, could become a political battleground if he chooses not to run. Evan Vucci AP
The congressional seat held by Rep. Joe Barton, R-Texas, could become a political battleground if he chooses not to run. Evan Vucci AP