2018Final results
2018 election for Texas's 31st District
U.S. House · Texas
John Carter (R) won with 50.6% of the vote, defeating Mary Jennings "mj" Hegar (D) by 2.9 points.
John CarterRepublican · winner
50.6%144,680
Mary Jennings "mj" HegarDemocrat
47.7%136,362
Jason HopeLibertarian
1.7%4,965
286,007 votes
Source: MIT Election Data and Science LabUpdated Oct 1, 2026, 6:17 AM ET
The seat over time
D − R margin in this seat's races around 2018
Races before and after
Source: MIT Election Data and Science LabUpdated Oct 1, 2026, 6:17 AM ET
Money in this race
Each line compares the two campaigns on one scale.
Mary Jennings "mj" HegarJohn Carter
$5.1M
Raised by the campaign
$1.8M
$5.1M
Spent by the campaign
$2M
$47.5K
Cash on hand
$254.7K
Campaign money: FEC, through Dec 31, 2018.
Source: FEC campaign filingsUpdated Dec 31, 2018