Info comes from the bottem of the link under update, it's five times if you read wikipedia.
Fred Phelps ran for major office in Kansas as a Democrat no less than four times. He ran for governor on the Democrat ballot in 1990, 1994 and 1998 and for senator in 1992. Phelps received 11,000 votes, or seven percent, in 1990, he received 5,000 votes, or three percent, in 1994 and he picked up 15,000 votes, or 15 percent, in 1998. And in the senatorial contest in 1992 he garnered 49,000 votes, or 30 percent. Phelps furthermore ran as a Democrat candidate for mayor of Topeka in 1993 and 1997.
p.s. I'm no Republican infact a very leftwing Brit but this does interest me.