You're missing the finer points of it. Merely suggesting irregularities in the voting, or even saying it's rigged is covered under the first amendment. However, when you have an armed mob at a rally, blocks from the capitol building, and you say "We fight like hell. And if you don't fight like hell, you're not going to have a country anymore" , that can very easily be construed as a call to arms. Like I said, we'll have to see what a judge and jury believe.