Tom Viksack got a boost for his campaign for the nomination on Thursday night, with an appearance on Jay Leno's tonight show.
Also appearing on the show was actor Jim Carrey.
Vilsack responded to concerns that he wasn't very well known, saying that he wasn't a rock star, he was rock solid. He also spoke of his energy plan and his intentions to pull the troops out of Iraq.
He also took part in a skit with an NBC security guard, who wouldn't let Vilsack onto the set because he didn't recognise him. An appearance on the biggest talk show in America will go some of the way to alleviating that problem.