Dianne Feinstein, Kevin de Leon have 1st and only debate ahead of midterm election

SAN FRANCISCO -- U.S. Sen. Dianne Feinstein and state Sen. Kevin de Leon took part in their first and only debate, just three weeks ahead of Election Day.

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The two Democrats faced off at the non-partisan Public Policy Institute of California in San Francisco. The group's president, Mark Baldassare, will moderate the debate.

The debate started at noon.

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De Leon received the California Democratic Party's nomination in July, but Feinstein leads in public polling.

She also has about $4 million left in her campaign to spend compared to de Leon's less than half a million. Feinstein is seeking a sixth term as senator.

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The Associated Press contributed to this report.