I believe the DA of LA county is a Republican I am not sure of the political persuasion of the Santa Monica DA, but it does seem to be a joint investigation.
The L.A. District Attorney is a Republican (don't know about the Santa Monica official). Of course, so is John McCain.
I've seen this too often to be reassured by an 'R' after a politicians name that they aren't doing the work of the left. Steve Cooley, the Los Angeles D.A., is running for California Attorney General (in a 'blue' state) so I'm not at all convinced that this isn't a witch hunt intended to ultimately smear Glenn Beck and any conservative broadcaster that Goldline sponsors by the inference that the broadcaster colluded with a dishonest gold broker in some scheme to defraud their faithful (but dumb, to the liberal mind) listeners/viewers. I'm surprised that any political conservative would be so easily assured that because the D.A. is a Republican, this can only be an investigation devoid of any political bias.
Frankly, it isn't as much about the sponsor as it is an attempt to cast suspicion on the conservative commentator. If this kind of investigation scares away potential advertisers for conservative broadcasters, from the left's point of view, its all for the better.
Fortunately, most listeners/viewers of Beck, Limbaugh and others are savvy enough to see the real intent behind this investigation. If some wrongdoing is found, which I doubt, let the company be prosecuted, but I maintain my belief that this is, as I've stated, politically motivated, especially in an election year with the popular tide turning hard against Democrats, who are likely becoming increasing desperate as they see their dream of a socialist utopia in America about to collapse with the November election. Sarah Palin was constantly accused of 'ethics violations' which were totally bogus but had to be investigated. They came to nothing. So will this.