At the California Democratic Party convention in Sacramento Saturday, Lt. Gov. Gavin Newsom called for marijuana legalization and described the war on drugs as "an abject failure." (Watch the speech here.)

The famously well-coiffed former San Francisco mayor is one of the key contenders for the Democratic Party gubernatorial nomination in 2014 -- if Gov. Jerry Brown (D) decides not to run again. The other leading contender is state Attorney General Kamala Harris, who did not broach the topic in her convention address.

"It's time to decriminalize, tax, and regulate marijuana," Newsom said to raucous cheers and applause. "In 2011 alone in this country, three quarters of a million people in the United States were arrested for marijuana law violations, 87% of them for simple possession. And listen to me closely on this -- African-American children are ten times more likely to get arrested for drug crimes than their white counterparts even though white children are more likely to abuse drugs."

"You can't make this up," Newsom said. "We send a higher percentage of African American males to prison and jail in this country than we send to colleges and universities in California. After 42 years of failure, I think it's time we concede that if we continue to do what we've done, we'll continue to get what we've got. I think you and we deserve better. It's about standing up on principle, having the courage of our convictions, about saying publicly all too often what we say privately."

The lieutenant governor's speech wasn't all high seriousness. Jokingly referring to his role as acting governor while Brown is on an overseas trip, he said, "I'm thrilled to be here… on the sixth day of the Newsom administration," he said. "This is the right time and the appropriate time to reflect on our cornucopia of landmark accomplishments over these magical six days." Among those was the creation of hundreds of new jobs, "notably in the now-booming hair gel industry," he said, patting his hair.

"All of these wonderful achievements will one day be studied by scholars at the Newsom Acting Governor Library, currently being constructed in the back of a medical marijuana dispensary in the Haight-Ashbury," he said to laughter and applause. "I'm looking forward to it as well," Newsom said, smiling.