President Donald Trump and JD Vance are among the high-profile political figures attending the memorial service for Charlie Kirk, which is expected to draw over 100,000 attendees at an N.F.L. stadium and an adjoining arena near Phoenix on Sunday. The event marks a significant gathering of political figures, with a separate memorial held at Utah Valley University in Orem earlier this month. The attendance of prominent political figures underscores the significance of Charlie Kirk’s legacy and the impact of his advocacy, particularly within conservative circles, as the event continues to draw widespread attention.