SCOTUS Comparison: Free Speech in Tinker and Citizens United

In recent years, the Supreme Court of the United States has issued several landmark decisions that reflect its evolving interpretation of the First Amendment's Free Speech Clause. Compare and contrast the reasoning and decisions in the cases of Tinker v. Des Moines Independent Community School District (1969) and Citizens United v. Federal Election Commission (2010). In your response, address how the Court's interpretations of free speech differ in these two cases, and how these interpretations reflect larger societal values regarding the balance between individual rights and governmental regulation.