07/27/2010 10:41 am ET | Updated May 25, 2011

Joe The Plumber Wades Into Missouri GOP Senate Primary With Anti-Roy Blunt Ad (VIDEO)

Conservative activist Samuel "Joe" Wurzelbacher -- otherwise known as "Joe the Plumber" -- is wading into Missouri's Republican primary race for Senate with a new television ad taking aim at conservative hopeful Roy Blunt .

"Once upon a time in a land called Missouri there was a pretender to the conservative throne with insider friends in high places and they were all moderate," a narrator says in the 30-second fairy tale-inspired spot. "Fortunately, there was Chuck Purgason, a true conservative, who would fight for Missouri."

Wurzelbacher signaled to the St. Louis Post-Dispatch that Purgason was unaware of his intention to endorse in the race. He added, "I wanted to show that individuals can have some say in what's going on."

Purgason, who hasn't yet raised sufficient funds to bring his message to television, encourages his supporters to watch the ad "developed and paid for by Joe the Plumber and Friends" on his campaign website.