Saturday is Election Day in Houston as voters decide runoff races for City Council and Houston Community College.

Rice University's Bob Stein says Mayor Annise Parker is keeping a close eye on the result, even if the public isn't.

“The mayor is probably looking at a council which is a little less sympathetic, and if you add to the fact some of the other members who have been reliable votes for her, like Stephen Costello, he's announced he's running for mayor in 2015,” Stein tells KTRH News.  “So these are candidates who may not be easy votes for the mayor's agenda.”

The city's At-Large Three race features two vocal critics of Mayor Parker - local bail bondsman Michael Kubosh who successfully fought the city's red light camera program, and former mayoral candidate Roy Morales.

“I think Kubosh is going to surprise everybody, and the mayor was a fool a couple of weeks ago when she attacked him in a press conference,” says Stein.  “She clearly doesn't want Morales on the council, he is more dreadful to her and her positions on issues.”

In the district races, former council member Barbara Stardig is trying to win back her district a seat from Helena Brown.

“I'm not surprised incumbents are being challenged, Andrew Burks has been a controversial figure, there have been a lot bad news stories about him missing meetings,” says Stein.  “Then of course, Helena Brown has been a controversial figure being 'Ms. No' voting against everything.”

Polls are open from 7 am to 7 pm Saturday.