On the Republican side, Lansdowne resident Joseph Hooe, who unsuccessfully ran for a District 12A seat in 2002, 2006 and 2010, said he "will take a serious look" at another run in District 12.

"I'm very passionate about public service, about local business and about our communities and I remain very interested in serving our communities, our state," he said. "At the moment I'm interested in the 2014 race, but I haven't made a decision on it yet."

Hooe, a 43-year-old who owns The Tire Network, in Baltimore, noted Friday: "The phone has just been ringing off the hook over this lately, especially today."

Other Baltimore County Republicans who have run in District 12A in the past, such as Catonsville residents Albert Nalley and David Aughenbaugh, do not even have the option to run for the open seat as they have been redistricted into District 44B.

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In Howard County, the last Republican to run against Bobo was Robert Wheatley, of Ellicott City. Wheatley could not be reached for comment.

While some potential candidates have said they are considering running for the open District 12 seat, others have said they are not.

"It's not something I'm considering doing at this point," Columbia resident Alan Klein said, noting the election is still two years away. Klein ran against Sigaty for her council seat in 2010 but lost in the Democratic primary.

Meanwhile, Bobo's decision could also affect incumbents Malone and DeBoy.

Malone, who said he's "definitely running," noted than the plan had been for him, DeBoy, Bobo and Kasemeyer to run together as a team. He said he plans to get together with DeBoy and Kasemeyer to talk strategy, but he really doesn't know who might consider running for Bobo's seat.

Whatever happens, Malone said: "I'm going to work my tail off.

"I have 16 new precincts. ... I have a lot of friends that live in Columbia that are going to help me, a lot of close friends out there, and I'm going to work very, very hard to get re-elected in 2014."

DeBoy could not be reached for comment.