In the case of United States v. James Brien Comey Jr., the U.S. president’s security is pitted against the bedrock right to free speech enjoyed by Americans.

Two federal charges have been lodged against former FBI Director James Comey and are based on his Instagram post that depicted seashells spelling out “86 47.”

Comey’s post was interpreted by the U.S. Department of Justice as a threat to harm President Donald Trump. The indictment, obtained by the DOJ, alleges Comey violated two federal laws: 18 U.S.C. § 871, which makes it a crime to “knowingly and willfully” threaten, kidnap or “inflict bodily injury upon the President of the United States,” and 18 U.S.C. § 875, which criminalizes “communication containing any threat to kidnap any person or any threat to injure the person of another.”

Comey’s argument against the charges is likely to be twofold: (1) He lacked the requisite intent that the prosecutor needs to prove his case, and (2) even if he had the intent required by the statute, his speech is protected by the First Amendment. U.S. District Judge Louise Flanagan set Oct. 21 as the Comey case trial date.

I’m a scholar of constitutional and criminal law as well as the First Amendment. The charges against Comey exist in a legal gray area that includes the First Amendment and a series of court decisions over five decades that have gone back and forth over what dangers constitute speech that can be punished.

In criminal law, there are generally two parts to most crimes – the criminal act and the criminal intent. The criminal act is referred to as the “actus reus.” The criminal intent is known as the “mens rea.”

Some crimes also require a particular result. For instance, murder requires a death of a person. A defendant can neither be charged with nor convicted of murder unless and until the victim dies. If the victim doesn’t die, then at most the defendant can be convicted of only attempted murder.

The criminal charges alleged in Comey’s case don’t........

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