In Arkansas Writers' Project v. Ragland (1987), for instance, the Court invalidated an Arkansas law exempting "religious, professional, trade and sports journals" from taxation since the law amounted to the regulation of newspaper content. In Leathers v. Medlock (1991), the Supreme Court found that states may treat different types of the media differently, such as by taxing cable television, but not newspapers. The Court found that "differential taxation of speakers, even members of the press, does not implicate the First Amendment unless the tax is directed at, or presents the danger of suppressing, particular ideas." In Branzburg v. Hayes (1972), the Court ruled that the First Amendment did not give a journalist the right to refuse a subpoena from a grand jury. The issue decided in the case was whether a journalist could refuse to "appear and testify before state and Federal grand juries" basing the refusal on the belief that such appearance and testimony "abridges the freedom of speech and press guaranteed by the First Amendment". The decision was that such a protection was not provided by the First Amendment. However, a concurring opinion by Justice Lewis F. Powell, in which he said a claim for press privilege "should be judged on its facts by the striking of a proper balance between freedom of the press and the obligation of all citizens to give relevant testimony with respect to criminal conduct. The balance of these vital constitutional and societal interests on a case-by-case basis accords with the tried and traditional way of adjudicating such questions," has been frequently cited by lower courts since the decision. Petition and assembly The Petition Clause protects the right "to petition the government for a redress of grievances". The right expanded over the years: "It is no longer confined to demands for 'a redress of grievances', in any accurate meaning of these words, but comprehends demands for an exercise by the government of its powers in furtherance of the interest and prosperity of the petitioners and of their views on politically contentious matters." The right to petition the government for a redress of grievances therefore includes the right to communicate with government officials, lobbying government officials and petitioning the courts by filing lawsuits with a legal basis. The Petition Clause first came to prominence in the 1830s, when Congress established the gag rule barring anti-slavery petitions from being heard; the rule was overturned by