Democrat Jocelyn Benson has opened a decisive five-point lead over Republican John James in Michigan's gubernatorial race, according to new polling that reflects a dramatic consolidation of Democratic support and mounting headwinds for Republicans heading into November. The Glengariff Group poll, conducted May 3-11 among 600 likely general election voters, shows Benson, Michigan's secretary of state, at 34.2 percent to James's 29.2 percent. The survey has a margin of error of plus or minus 4