I don't know. How would I know? I wouldn't, and neither would you. I know WaPo, CNN and the NYTimes reporters swear there isn't, because their anonymous sources claim that everything was on the up-and-up, and we all know reporters are the brightest and the best, so they have done detailed analyses of data, and they have in no way tried to
If you read the full quote, that is what Stone said - challenge it in the courts. His reference to violence is not acceptable, but hardly different than Democrats calling for "unrest" and all that, harassment of elected officials, and the like, when it suits them. Democrats aren't worse, but they certainly aren't better. Politics is about power, and power corrupts, and it's not just Republicans who are corrupted. Both sides will cheat. And, they do. This myth sold to the public that there is "no such thing as voter fraud" is absurd - it strains credulity and is counterintuitive - humans cheat on everything, from taxes to save a buck, to poker games, to tests in order to pass some stupid business administration course, or to get into a club or organization. They lie about everything, but for some reason Democrats have convinced much of the public that voting is sacrosanct, and that to even think that someone would organize a fraud in voting is tantamount to treason. Yet, in many many elections, allegations of fraud, challenges to electors, court cases, etc. are done to try to "overturn" the results. Only when Trump does it, it's treason.