In 1993 she replaced long-serving Alan Cranston as U.S. Senator from California
He 
had left the Senate in 1993 and since then founded and helped run a... [DOC] [TLE] Keystone Foe, Long-Serving Democratic Senator Will Not Seek Re ... [PAR] Jan 8, 2015 ... After more than two decades as one of California's U.S. senators, Barbara Boxer 
announced Thursday morning that she will ... setting up a wide-open primary for 
a seat Boxer has held since 1993, reported Politico.