After winning the nomination , she is challenging incumbent Republican John Carter .
In July 2017 , Hegar announced her candidacy for the Democratic nomination for United States House of Representatives to Texas 's 31st congressional district .
After winning the nomination , Hegar is challenging incumbent Republican John Carter .
In July 2017 , Hegar announced her candidacy for the Democratic nomination for United States House of Representatives to Texas 's 31st congressional district .