Early voting for Houston's runoff elections starts today and runs through Dec. 5, with the election scheduled for Dec. 9. The mayoral race is the most high-profile contest, with U.S. Rep. Sheila Jackson Lee and State Sen. John Whitmire vying for the position. Here's a breakdown of the races and candidates. #HoustonElections #HoustonRunoff #SheilaJacksonLee #JohnWhitmire #HoustonCityCouncil #CityController