People rallied Monday in Milwaukee to stop Wisconsin governor-elect Scott Walker from killing the federally funded project.
Supporters say building the new rail system will create much needed jobs.
U.S. Transportation Secretary Ray LaHood was in Chicago Monday. He says Wisconsin is not interested in building high-speed rail, and added Illinois and other states could get government funding.
Earlier this year, Illinois received over $1 billion in federal stimulus to install high-speed rail lines across the state. That money is being used to improve lines from Chicago to St. Louis and Chicago to Madison, Wisconsin.