@houstonchronicle: Election Day has arrived in Houston. Polling centers opened at hundreds of locations across Harris County as the clock struck 7 a.m. on Tuesday. Voters will decide one of the most highly anticipated U.S. Senate races in the country as Democrats and Republicans jockey for control of Congress in this year's midterm elections. Several other major seats hang in the balance, including Texas governor and lieutenant governor, Harris County judge and several other congressional races. Click the for live updates. 📝: Jarrod Wardwell / reporter 📸: @melissaphillip713 , Tanya Babbar, Octavia Johnson / photographer