Update: U.S. District Judge Richard Kopf on Thursday apologized for asserting that Ted Cruz wasn't fit for office. In a follow-up blog post, the judge said he now agrees with George Washington University Law School Orin Kerr that his comment on Mr. Cruz's fitness for office violated a conduct rule prohibiting U.S. judges from publicly endorsing or opposing a candidate for public office. While saying he stands by his criticism of Mr. Cruz, Judge Kopf said he shouldn't have said the senator isn't suited to become president. Wrote the judge:

Specifically, when I wrote that “Senator Ted Cruz is not fit to be President” and when I made related assertions of unfitness for office and the like in reference to Senator Cruz as a candidate for the Presidency, I crossed the line under the holding of the Calabresi opinion. I therefore violated Canon 5(A)(2) of the Code of Conduct for United States Judges. Consequently, apologize to you, Senator Cruz and everyone else for my error.

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Republican presidential candidate Ted Cruz raised eyebrows with his idea of giving voters the power to oust Supreme Court justices from the bench.

One federal judge says he's so offended by the Texas senator's proposal that he thinks it should disqualify him from the White House.

That's the opinion of U.S. District Judge Richard Kopf of Nebraska, a part-time blogger who has attracted his own share of controversy.