SACRAMENTO - Even before her wild ride last week on Interstate 80 that ended in a collision, state Sen. Carole Migden blazed a jagged political path as a state legislator known for her fiery temper and often impertinent attitude. In one tightly wound package, Migden embodies the best and worst of liberal San Francisco politics. She is an effective lawmaker, without a doubt. But she's also a throwback emblem of political entitlement whose career has been marked with infamous moments, such as the time she pushed an opposing lawmaker's vote button - for her own bill - in the Assembly....