MoveOn.org member Lauren Valle was carrying a sign reading "Rand Paul RepubliCorp Employee of the Month" and wearing a blond wig. Reports say she was there to present Paul with a fake Employee of the Month award for his work for RepubliCorp, what MoveOn considers the merger of the Republican party with corporate interests.
It's not known yet if Valle posed any threat to either candidate or what authority (if any) the man who tackled her to the ground had in doing so but one thing is certain - it's clear from watching the video that Valle was assaulted by a member of the crowd.
What was done to Ms. Valle is deplorable. There is NO REASON for people to defer from civil discourse before a political election and instead turn to violence on ANY side of the aisle. There's no excuse.
EDIT: I just found out about this and, as I don't live on my computer (though certain persons here MUST think otherwise), I posted what information I knew for a fact after hearing the story. People have been posting some articles in the comments and if others want me to link them here, I will if that's requested.
CNN - Woman stomped outside Kentucky debate
POLITICO - MoveOn rep stomped at Ky. debate
HuffPo - Apparent Ron Paul Supporter Stomps On MoveOn Member's Head
Answer to the controversial wig question: "Valle said she wasn't wearing the wig to disguise herself, but that she simply enjoys wearing fake hair as artistic expression." [Link]
Um, okay...the same article also mentions that she had no interaction with Paul supporters before the incident and that Valle was hired by MoveOn.org to work on the RepubliCorps campaign in Kentucky for three weeks.