ABC News’ Teddy Davis reports: When California chooses a successor to Gov. Arnold Schwarzenegger (R) next year, the Democratic primary is expected to feature one candidate who was still in knee-pants in 1975 when his top rival was already serving his first term as governor. "It’s true. I sat in Jerry Brown’s lap," San Francisco Mayor Gavin Newsom told ABC News when asked about the anecdote his advisers are peddling. Candidates typically shy away from discussing biographical details which could be used to underscore their relative youth. But in the wake of President Barack Obama’s win over two more seasoned rivals, Newsom’s team is embracing the story, believing that it will help the 41-year old mayor tap into a hunger for generational change in a race against the better-known Brown, a three-time presidential candidate, who is 70 years old. "We’re going to be talking a lot about the future," said Newsom whose father, a former state appellate court judge, was well-acquainted with Brown in the 1970s. "Those who think they have this locked up are underestimating the capacity of the voters to have a real choice." Read my full ABC News interview with Newsom by clicking here. Listen to a separate podcast interview that ABC’s Jake Tapper did with the San Francisco mayor by clicking here.