These are bad numbers, but lets be honest: If Virg Bernero were the nominee again, he would most likely lose ANYWAY.
The Michigan electorate is likely to be radicalized in 2014. Michigan's trade unions are going to ensure that just about any Republican faces a severe challenge. The GOTV drive will be as strong as in they year of a Presidential election. There will be a sitting governor that Big Labor, feminists, and urban activists will still hate. With the retirement of Carl Levin there will be an open Senate seat. Of course every US House seat will be challenged. There could be initiatives and referenda on splitting the state's electoral votes.
Virg Bernero ran a poor campaign in a bad year for Democrats, and the Democratic Party practically abandoned his campaign to protect what it thought that it could. It is unlikely that Bernero would win the nomination; the Democratic bench is very deep. But the Michigan Republican Party is unlikely to recover from its Pyrrhic victory of the Right to Work (for Third-World wages) law.