And a big chunk of those contributions come from socialist and Hillary friend George Soros.
Yes the donations are voluntary, but that still doesn't negate the facts that socialist Soros is a big donor(probably the biggest) to the pro-drug side.
And why is that significant? Your desire to make the source of the donations the only relevant issue seems calculated to give you the advantage of being able to present a one-sided argument. You can point to Soros, or any other contributor and find something about them you can use to prejudice the issue. OTOH, the opposition to drug law reform is financed from the world's bigges slush fund - the federal budget. Who funds the opposition? Everyone, and no one. You can talk about how much money Soros has contributed without worrying about anyone pointing out how much the government has spend supporting the campaign to defeat the proposals because we don't know and probably can't find out. The federal budget is such a mess it can't even be audited.
It's a clever dodge, but it's still a dodge.