Hope Baker is one determined young lady. She won't take no for an answer, even though it looks like her Don Quixote-type quest has run smack into a legislative windmill up at the state Capitol. Along with Jayne Jones, her Concordia University political science professor, and six like-minded classmates, the 22-year-old Alexandria native and law school aspirant wants to add impaired driving as a specified exclusion to a state law that grants lawmakers immunity from arrest in certain cases while the session is underway. But the push to clarify a centuries-old state Constitution provision has not gone over well with...