Bottom line: It's cheaper. No actual votes will be tallied, and the difference in delegates might only be one or two even if all the votes were counted and Sanders won.
The Vermont senator's organization was down to $5.8 million at the end of April as it bought ample ad time in California's TV markets. The campaign spent 43 percent more than it raised that month.
He can do it through a joint fundraising apparatus for his campaign, the Republican National Committee and 11 state Republican parties. It's something Hillary Clinton has been doing since last year.