According to an article by Voice of San Diego, the Chargers may have enlisted pollsters in their attempt to convince the NFL that they have to go to Los Angeles.
In this article by Scott Lewis for Voice of San Diego, it was revealed that the presentation made by San Diego to NFL Vice President Eric Grubman relied on polling to prove that voters in San Diego would be willing approve the use of public money to build a stadium to replace Qualcomm Stadium.
According to the article:
The poll showed that 51% of respondents would support a government investment in a new stadium if it comprised one-third of a $1 billion or so facility.