(St. Paul, MN)  --  Governor Dayton this morning (Wed) signed the Minnesota Health Insurance Exchange bill into law, and officials then unveiled its new name, MnSure.  One-point-two-million Minnesotans are expected to use the on-line-based tool to select health insurance from a number of policies pre-screened by a special board.  Dayton says the exchange will serve the people of Minnesota -- not the health insurance industry or any other industry.  Republicans were noticeably absent from the signing ceremony in the Great Hall at the State Capitol.  They warn insurance premiums will go up, Minnesotans' choices will be limited, and some say it's the first step toward government-run health care.