Former Assemblyman Tom Umberg has joined the Democratic field to challenge Republican state Sen. Janet Nguyen, bringing strong credentials — and immediately drawing a harsh attack from the California Republican Party.

The attorney served in Sacramento’s lower chamber twice, from 1990 to 1994 and again from 2004 to 2006. He is a retired Army colonel and former federal prosecutor who was deputy drug czar under President Bill Clinton from 1997 to 2000.

“I’m running for state Senate because I believe that our community needs a strong fighter in Sacramento who will stand up to President Trump and his administration on important issues like health care, immigration, energy, the environment, civil rights, education and consumer issues,” Umberg said in a Wednesday statement announcing his candidacy.

But in addition to his accomplishments, Umberg has seen his share of setbacks. He’s lost four elections, including a third-place finish in a special election for county supervisor in 2007 (Nguyen won) and losing a 2006 state Senate race to fellow Democratic Lou Correa by nearly 20-percentage points.

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