Once upon a time, they held out for a judgeship for their cousin. Now, they want constitutional amendments. As California's Legislature has grown more stridently partisan and its two-thirds approval requirement on budgets and tax-increase bills grows increasingly difficult to secure, the time-honored game of political logrolling has evolved to much higher stakes. And if the 2009 version is any indication, the new way is here to stay. "Logrolling" is a term of political art that refers to what is usually quietly conducted horse-trading among lawmakers: You back my agenda, I back yours. But as legislators have become entrenched in...