[ST. PAUL for Tuesday m.e.] In a poll, released today, State Attorney General Skip Humphrey is the favored DFL Gubernatorial candidate by most DFL voters expecting to vote in the this months' primary. There are a couple of surprises that emerge from the numbers---DFL endorsed candidate Mike Freeman has slipped to THIRD...and Department Store heir Mark Dayton--once considered a dark horse--has emerged as a competitor. Minnesota Public Radio's Karen Louise Boothe reports: The poll conducted by Minnesota Public Radio--KARE-11--and the Pioneer Press, shows that if the Primary were held TODAY--38 percent of DFL voters would vote for State Attorney General Skip Humphrey and 23-percent for Mark Dayton. Ted