What is the test for an anti-SLAPP motion de novo?

We review the trial court's order denying an anti-SLAPP motion de novo. (Flatley v. Mauro (2006) 39 Cal.4th 299, 325.) "'We consider "the pleadings, and supporting and opposing affidavits . . . upon which the liability or defense is based." [Citation.] However, we neither "weigh credibility [nor] compare the weight of the evidence. Rather, [we] accept as true the evidence favorable to the plaintiff [citation] and evaluate the defendant's evidence only to determine if it has defeated that submitted by the plaintiff as a matter of law."'" (Id. at p. 326.) The anti-SLAPP statute is to be broadly construed. ( 425.16, subd. (a).)

A defendant can meet his or her burden of making a threshold showing that a cause of action is one arising from protected activity by demonstrating the acts underlying the plaintiff's cause of action fall within one of the categories of section 425.16, subdivision (e). (City of Cotati v. Cashman (2002) 29 Cal.4th 69, 78.) Section 425.16 provides in relevant part: "As used in this section, 'act in furtherance of a person's right of petition or free speech under the United States or California Constitution in connection with a public issue' includes: . . . (2) any written or oral statement or writing made in connection with an issue under consideration or review by a legislative, executive, or judicial body, or any other official proceeding authorized by law, (3) any written or oral statement or writing made in a place open to the public or a public forum in connection with an issue of public interest, or (4) any other conduct in furtherance of the exercise of the constitutional right of petition or the constitutional right of free speech in connection with a public issue or an issue of public interest." (Id., subd. (e)(2)-(4).)