Republican state Sen. Joe Leibham of Sheboygan and Winnebago County executive Mark Harris are the latest candidates for Republican congressman Tom Petri's congressional seat. Petri announced earlier this month that he will not seek re-election. Leibham says he wants to be a reformer in Congress and help reduce taxes, which he says are too burdensome. He announced his candidacy Tuesday at his parents' home in Sheboygan. Harris became the first Democrat to declare his candidacy earlier Tuesday. Harris says preserving social security, transportation, making higher education affordable and raising the minimum wage are his top priorities. Leibham will face primary opponents state Sen. Glenn Grothman and state Rep. Duey Stroebel in the Republican-leaning district that spans eastern and central Wisconsin. Harris was a guest Tuesday on AM 1170 WFDL's Between the Lines program. Leibham will be a guest on the news program Wednesday morning.