This morning, the National Republican Campaign Committee took to social video service Vine to debut what they’re calling it a first for the service, which was bought by Twitter earlier this year.

Vine, which just this week became the top app in Apple’s App Store, allows users to record and share looping six-second videos to the web. Twitter unveiled Vine in January, hoping to mimic the highly-sharable, insanely popular network built by Instagram, which was bought by Facebook a year ago.

In the ad, a female narrator warns, “Colbert Busch and the labor unions mean fewer jobs in South Carolina” over cycling black and white images of shadowy, dour-looking faces. Sanford and Colbert Busch have traded jabs over labor unions throughout the week.

The NRCC, which has aggressively targeted Colbert Busch in her special election campaign against former Gov. Mark Sanford, said the spot was “the first time a political organization has launched an actual ad on Vine to attack an opponent.” Not sold on Vine? Well, expect to see more campaign material like this, because the NRCC also called the service “new frontier of political media.”

Sanford faces Colbert Busch in the special election for the 1st Congressional District on May 7.