MILWAUKEE (AP) _ A former bicycle executive who plans to challenge Gov. Scott Walker in next year's election has a lot of work to do to introduce herself to voters.

A Marquette Law School poll released Tuesday says 70 percent of voters don't know who Mary Burke is. But that doesn't mean they won't vote for her.

The poll says 47 percent of respondents would vote for Walker and 45 percent for Burke. The differential is within the poll's 5 percentage point margin of error.

Democratic state Sen. Kathleen Vinehout is also considering a run. The poll says 79 percent of respondents didn't know who she is. But again, she'd get votes. The poll says Walker edges her, 47 percent to 44 percent.

The poll interviewed 800 registered voters between Oct. 21 and Thursday.