 Bivens said the Secret Service was in charge of securing the area. No one from the Secret Service was present at the news conference to take questions. Marie Andrusiewicz, NPR News. Congressional Republicans are calling for a speedy investigation into last night's shooting. House Speaker Mike Johnson says he's planning to hold hearings to examine the security lapses at the event. Lawmakers are expected to call on the FBI, Secret Service and Department of Homeland Security to testify.