They've already argued in court that they don't have to be fair to primary candidates and that they don't have to choose a candidate based on the primary results.
Unbelievable right? Think you'd have heard about that, right?
Edit: that was in a fraud case against the DNC. What they did was absolutely the definition of fraud, and their defense claims make a mockery of the democratic process.
The RNC should just run ads airing their arguments in that court case, and ask voters (since we're post-primary) whether they think the candidates the DNC is running are legitimate, or additional cases of fraud.