"..conservative candidates and organizations have to raise money from individuals who contribute voluntarily, out of conviction, while Democrats and liberal organizations are able to extract money by force from taxpayers and others. The Left has managed to institutionalize itself.
Labor unions are the most notorious example of this phenomenon, although by no means the only one. In many states, Democratic politicians have enacted laws that compel workers to contribute to labor unions; union bosses, in turn, take much of that money and contribute it to Democratic politicians. This is the real “dirty money” in politics."