Are White Nationalist extremists attempting to take over the Republican Party?

It’s possible but it is hard to prove until well after it happens. This is just one more piece to add to the puzzle:

The Morning Call
Tailgunner Joan (Orie-Melvin)?
by John L. Micek

The Morning Call post is about an ad for Republican state Supreme Court candidate Joan Orie-Melvin on the site GrassrootsPA.

Look for the hammer and sickle on the red banner add in O for Obama. This communist – Jewish – Mexican – or Muslim plot stuff is typical White Nationalist rhetoric.

Although they may use the Republican Party for a conduit White Nationalists are not exactly loyal Republicans or loyal US citizens.
You can find the article here:
http://blogs.mcall.com/capitol_ideas/2009/10/tailgunner-joan-oriemelvin.html

See:
Republican Gomorrah by Max Blumenthal
http://www.republicangomorrah.com/

And:
Blood and Politics: The History of the White Nationalist Movement from the Margins to the Mainstream (Hardcover)
by Leonard Zeskind

http://www.amazon.com/Blood-Politics-Nationalist-Movement-Mainstream/dp/0374109036