Heck, even someone with no experiences in making political commercials could put together ads which would crush Bernie in the general election, especially if I had the hundreds of millions of dollars from the Koch brothers and friends bank rolling me. And I wouldn't have to lie.
Clinton hasn't attacked Bernie where he is most vulnerable for four reasons, 1) She isn't going to stoop that low, 2) She doesn't have to because she can easily beat him without using those tactics, red baiting wouldn't work very well in the Democratic primaries, and 4) there is no use ticking of Sanders's supporters which would normally support her in the general election.
However, none of those reasons apply to either Trump or Cruz or the PAC's run the Koch brothers and their corporate friends. And the way Bernie has been going after the 1% and corporate power brokers they should be able to raise hundreds of millions of dollars to destroy destroy him.
Bernie on the other hand has sworn off PAC's so he won't have the money to defend himself.
It's would be very ugly.
But don't worry he'll never make it to the general election so you won't have to witness him being sliced and diced. 
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