"Party attack" refers to a situation where a group of people criticizes or opposes another group or individual, often publicly, with the intention of causing harm or creating conflict. Full definition
He's obviously got something going for him in the political arena as he's now been the proud target of Conservative party attack ads. (canadianlawyermag.com)
She has third party attack ads on issues no one cares about. (nystateofpolitics.com)
Dodging Tea Party attacks, EPA made a goal that will unleash the free market in it's relentless pursuit of efficiency. (treehugger.com)