SAN FRANCISCO -- A packed house of supporters roared Monday as Governor Gavin Newsom made his closing argument for Proposition 50, a ballot measure that could reshape California's congressional maps.

"They poked the bear, and the bear is poking back," Newsom told the crowd. "Prop 50 is not about drawing lines on a map. It is about holding the line to what makes us who we are."

CA Election: Everything you need to know about Prop 50

Flanked by prominent elected Democrats and union leaders, including labor activist Dolores Huerta, the governor urged his party to leave everything on the field and turn out "in record numbers."

Speaker Emerita Nancy Pelosi praised Newsom's leadership - in what might have been a nod to the governor's presidential ambitions.

"This governor has a vision for

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