In an interview Tuesday, Mr. Hogg said they had been singled out because of their prominence and emphasized that ad hominem attacks would not end school shootings.

“I mean, we’re kind of the faces of the movement,” he said. “Together we kind of form an unstoppable force that terrifies them.”

He added that he and Ms. González were being attacked “because they know we’re strong.”

Here are a few of the recent attempts to discredit the students.

RedState, a conservative blog, questioned whether Mr. Hogg was even at the school on the day of the shooting, then backtracked Monday.

RedState, a conservative blog, ran an “update” Monday evening to a story it had published that questioned whether Mr. Hogg was present at Marjory Stoneman Douglas during the day of the shooting.

Sarah Rumpf, a writer for RedState, had questioned Mr. Hogg after watching an interview where he said he rode his bike to the school on the day of the shooting to interview his classmates.