MADISON, WI (WTAQ) - Wisconsin Democrats and their supporters will file petitions Tuesday demanding a recall election against Governor Scott Walker. But the Democrats are still not sure who will run against the Republican Walker. Over the last two months, Walker has stood out in the race by running a barrage of campaign commercials, describing how his budget and union bargaining limits have saved millions of tax dollars. But Democrats and union leaders said it was part of their strategy to lay low for now. Marty Beil with the Wisconsin State Employees Union said it has forced Walker to run on his record instead of against a specific Democrat. Ciara Matthews of the Walker campaign says the governor’s record will stand in quote, “stark contrast” to whoever the Democratic nominee will be. State Democratic Party chairman Mike Tate says it might be March before a field is set. Among those reportedly interested are Milwaukee Mayor Tom Barrett, former Dane County Executive Kathleen Falk, La Crosse Congressman Ron Kind, former Wausau Congressman Dave Obey, state Senate Democrats Jon Erpenbach of Middleton and Tim Cullen of Janesville, and Assembly Minority Leader Peter Barca of Kenosha.