I'd hardly call taking someone to task for their demonstrated voting record and documented campaign financing "crossing the line".
If you think Sanders crossed a line and Clinton didn't, you really haven't been paying attention. In fact, Clinton has been trying hard to damage Sanders using distortions and flat out lies. She recently tried to blame Sandy Hook on Sanders, and was called on it, not just by Sanders supporters, but
by her own.
Hillary Clinton Using Sandy Hook Victims as Political Props Just Backfired Completely
In a Twitter message she tried to lay the Sandy Hook shooting at Sanders feet, and her own supporters fire back and tell her how badly she screwed up. A few switched sides. Screencaps of the actual messages are at the link.
Excerpt:
Like her false claim that the gun problem in New York is because of guns coming from Vermont, which she also tried to blame Bernie for. And she was called out on that
by her own superdelegate supporters[/url]. Not only is Vermont responsible for less than 1% of the firearms in New York; but according to the FBI report, the largest source of guns on New York streets is from the Southern states, Virginia and Georgia, who are Clinton's biggest support base. Something I'm surprised the Sanders campaign hasn't brought up.
Pro-Clinton Superdelegate Says Hillary’s Latest Gun Claim Is Completely Wrong
Excerpt:
Hillary’s Latest Gun Attack On Bernie Is Not Backed Up By Federal Data
Excerpt:
Of course, she's not the only one who has been caught trying to smear Sanders. New York Daily News and CNN reporters were called out by the New York Times and The Accountability Project for taking quotes out of context to try and make Bernie look bad. Naturally, Hillary continues to use the distorted quotes as part of her increasingly vicious campaign.
CNN Just Got Called Out for Manipulating Bernie Sanders’ NY Daily News Interview
Excerpt: