Whether the Court had to decide whether a retaliatory arrest supported by probable cause violates the First Amendment before resolving qualified immunity.
Holding
No. The Court declined to decide the underlying First Amendment question because the right asserted was not clearly established when Howards was arrested.
Reasoning
Qualified immunity protects officials from damages unless they violated a statutory or constitutional right that was clearly established at the time of their conduct. Under Pearson v. Callahan, a court may resolve the clearly-established prong first and need not decide whether the Constitution actually recognizes the asserted right.
The Court therefore left open both whether probable cause defeats a First Amendment retaliatory-arrest claim and whether Bivens supplies a damages action for such a First Amendment claim against federal officers. Its decision rested solely on the absence of clearly established law.