A group of Republican lawmakers and two interest groups who pushed for voter ID now are going to court to stop a state website that allows voters to register online. In a lawsuit filed in Ramsey County District Court on Monday, the group contends that DFL Secretary of State Mark Ritchie overstepped his authority when he launched the website in September. More than 2,000 Minnesotans have submitted voter registration applications since then. Dan McGrath, president of Minnesota Majority, said Monday that the lawsuit will not immediately affect anyone who used the system to register for Tuesday’s local elections. But, he said, it could be used to challenge the results of those elections, particularly in close races. The suit seeks action by mid-December. If a court found that Ritchie lacked the authority to start the website, the group could ask that votes cast by those who registered online be disqualified. More than 80 city and school board races are being held across the state on Tuesday, including mayoral contests in Minneapolis and St. Paul.