Hal Turner has been arrested for advocating the murder of public officials. When will Not-Joe the Not-a-Plumber be similarly arrested?

Sarah Palin's 2012 running mate calls for the lynching of Sen. Chris Dodd:

Samuel "Joe" Wurzelbacher, better known as "Joe the Plumber," has had his fifteen minutes of fame during the 2008 election and was widely expected to disappear when the candidate who brought him into the spotlight lost. But he's still a star in conservative circles -- and still saying some odd, hostile things. At an event Thursday for the Wisconsin chapter of Americans for Prosperity (one of the lead organizations behind the Tax Day Tea Parties), Wurzelbacher suggested Sen. Chris Dodd (D-Conn.) should be lynched.

Wurzelbacher has a reputation for being a blunt, politically incorrect speaker. Referring to Sen. Chris Dodd, D-Conn., more than once, Wurzelbacher asked, "Why hasn't he been strung up?"

For those not familiar with the Hal Turner situation, Turner is a lunatic who broadcasts an internet radio show out of his North Bergen, NJ home. He's been arrested before; the latest charges involve threatening public officials with violence (emphasis mine):

Hal Turner, an occasional talk show host on internet radio and blogger, was arrested today by the FBI in his New Jersey home on charges he threatened to murder three federal appeals court judges in Chicago following their recent ruling upholding handgun bans.

According to the U.S. attorney's office, postings on Turner's web site included photos of the judges and addresses for them, with statements such as: "Let me be the first to say this plainly; These judges deserve to be killed."

The three judges have long served on the 7th Circuit U.S. Court of Appeals: Frank Easterbrook, the current chief judge; and Richard Posner and William Bauer.
Turner, 47, was charged with threatening to assault and murder the three judges with intent to retaliate against them for performing their official duties. He is to appear in court tomorrow in U.S. District Court in Newark, N.J., but the charges were brought in Chicago, where the judges work.

So what is the difference between "Why hasn't he been strung up yet?" and "These judges deserve to be killed"? Absolutely none. So why hasn't Samuel Joseph Wurzelbacher been arrested for threatening a public official, and why is he still a star in the Republican Party?

UPDATE: I see that Great Minds Think Alike.