From Fox News' website The Fox Nation, accessed on April 2:
The “Democrats' Rainbows and Unicorns” video was put out by the National Republican Senatorial Committee, which describes itself as “the only political committee solely dedicated to electing Republicans to the U.S. Senate.”
Previously:
Campaign Arm: Fox promotes GOP campaign video, which suggests Becerra laughed at the Pledge
More Fox campaigning: Now they're plugging “Pawlenty's picks” for 2010