Like you spoke of, it does happen, and I suppose some Stabinow voters will vote for DeVos. But if she is still 20 or so points ahead in November, Mr. DeVos will not make it in my humble opinion.
That obviously didn't happen in 2002, when a full 9% of Levin voters jumped to Posthumus. Nor did it happen in 1994, when around 5% of Engler voters also voted for Bob Carr. Or in 1990 when 9% of Levin voters also voted for Engler. So, I find it doubtful that all voters will vote straight ticket in 2006, especially since state races are *usually* less partisan from national races.