MINNEAPOLIS (AP) -- Minnesota's legislative auditor plans an investigation into the launch of MNsure, the state's new online health insurance exchange. Auditor Jim Nobles plans to start his investigation with the vendors that received tens of millions of dollars to build the website. Nobles says the first phase will focus on whether the IT contractors delivered on their promises and whether the state kept a close enough eye on their work during the process. A team from Nobles' office will kick off the audit Tuesday morning at the Minnesota Department of Commerce, which handled the flow of federal funds to the state. Officials with MNsure, the Department of Commerce and various vendors did not respond to requests for comment.