William Gheen is an ardent teabagger and the leader of Americans for Legal Immigration PAC or ALIPAC (your standard “put minefields around the border” anti-immigration group).
He is probably best known for his claim that Lindsey Graham is a liberal traitor (seeing Lindsey Graham as liberal should be lunacy enough) because he has worked with Democrats. The reason he is a liberal traitor, according to Gheen, is because he is gay (something Graham denies). The implicit premise is, of course, that being gay leads to being corrupt: see here,
here, and here.
A fair analysis of the incident is here.
The organization’s website is here. It is exactly what you’d expect, for instance with respect to providing news about Mexico and Mexicans to show how bad they are and how dangerous they would be to the American Way of Life™ if they were let into the country.
Diagnosis: Kook and nutjob, hateful and evidently reality-impaired. Whether he actually wields any influence on opinion or just reflects a standard wingnut position is unclear.