According to Judicial Watch (link):

In what appears to be a first for a serious presidential contender, Hillary Clinton’s campaign is going after five comedians who made fun of the former Secretary of State in standup skits at a popular Hollywood comedy club.

A video of the short performance, which is less than three minutes, is posted on the website of the renowned club, Laugh Factory, and the Clinton campaign has tried to censor it. Besides demanding that the video be taken down, the Clinton campaign has demanded the personal contact information of the performers that appear in the recording. This is no laughing matter for club owner Jamie Masada, a comedy guru who opened Laugh Factory more than three decades ago and has been instrumental in launching the careers of many famous comics. “They threatened me,” Masada told Judicial Watch. “I have received complains before but never a call like this, threatening to put me out of business if I don’t cut the video.”

However, on yesterday's John and Ken Show (KFI radio, Los Angeles), Masada called in and said that the person who threatened him only identified himself as "John". Masada also admitted that the phone call could have been a prank by a comedian or someone else.

"John" could in fact be associated with the Clinton campaign. However, given that there's no evidence of that, it's at best sloppy reporting to present this as Judicial Watch does.

11/20/15 UPDATE: Audio from kfiam640 . com/media/play/jamie-masada-on-john-and-ken-26522418/ embedded below: