This brief brings together, among others, Bob Barr and Bobby Rush. Here is how the brief phrases the question presented:

Whether, in a case involving solicitation of campaign contributions, Evans v. United States, 504 U.S. 255 (1992), modified the holding of McCormick v. United States, 500 U.S. 257, 273 (1991), that an “explicit promise or undertaking” by a public official to perform or not to perform an official act is required to prove extortion under color of official right (and by extension bribery and honest services fraud), and, if so, what is the standard for distinguishing lawful attempts to obtain campaign contributions from criminal violations.