House Speaker Nancy Pelosi threw her support behind San Francisco District Attorney Kamala Harris in the California Attorney General's race today, the latest in a string of prominent endorsements for the Democratic front-runner.

The announcement comes on the heels of new polling that shows Harris well ahead of her opponents in the June Democratic primary. Earlier this week, a poll commissioned by Harris' campaign showed her with 25 percent voter support statewide, compared to 9 percent for her closest Democratic competitor, former Los Angeles City Attorney Rocky Delgadillo.

The endorsement from California's most powerful Democrat is a plum for Harris, and comes after last week's endorsement from L.A. Mayor Antonio Villaraigosa.