You posted a video of a Sunday Talk Show using video of an online site. The online site did not air the Ad. It is just an anti democratic website which as tons of negative stuff about democrats. It was NOT aired by the Republicans. It was used by Stephanopolous as an intro to a question of Clinton.
This is standard fair for the media. They introduce a video or an issue and try to get the candidate to respond. It is not proving that they are airing ads against her because she would be harder to beat unless they are actually AIRING ads.
Knock knock on your head. Democrats have similar sites which air hits on Republican Candidates. It does not mean that we are trying to influence the primary. I say and hear amazing things about how bad Ted Cruz would be if elected and have cited to video of some of his past. This does not mean I think he is the Republicans best candidate in the General Election. It means I am disgusted by him.
Republicans have the same disgust against Hillary and have had that for 25 years. Its not proof or evidence or a hint that they consider her the most dangerous candidate. It does mean that she is the most likely candidate that they are testing various attack lines against Hillary. That is what the Times article said. As Bernie looks more viable, I would expect them to start doing negative research on Bernie and testing various attack lines against him.
However, I still have the question open. Are the republcans actually running primary ads against Hillary now anywhere in the country or ads in favor of Bernie in an attempt to influence the primaries?