A new poll of Michigan voters’ preferences in the governor’s race has troubling results for Democrats. The two leading Democratic candidates would lose to any of the three top Republican challengers if the election were held today, according to the poll by EPIC/MRA of Lansing released exclusively to the Free Press, WXYZ-TV (Channel 7) and three outstate TV stations. […] Among Republicans, U.S. Rep. Pete Hoekstra of Holland has a lead of six percentage points over Attorney General Mike Cox.