The move follows Director Joseph Clancy's decision to change his story about what he knew.
Omar Gonzalez pleaded guilty in March to the charges.
The sender is believed to smoke enough to create trace amounts of cyanide in his saliva.
Secret Service Director Joseph Clancy will testify before Congress next week days after a report...
The agency said it has coordinated flights with federal, state and local agencies.
Both issues come in light of recent safety incidents.
Young drivers with no special training transport staffers and reporters.
The woman was arrested less than an hour before Obama's immigration speech.
House Homeland Security Committee Chairman Michael McCaul (R-Texas) introduced legislation that...
OPINION | A number of federal law enforcement agencies are in dire need of reform.
"A lot of this was reported over two years ago," spokesman Eric Schultz told reporters.
Chaffetz questions whether White House investigated possible involvement of aide.
The legislation comes in response to a string of high-profile security incidents.
President Obama and the first family remained in the building during the security sweep.
"The sample was transported to another facility to confirm the results,” Secret Service said.
Two officers allegedly drove a government vehicle into a White House barricade.
Joseph Clancy will be named the agency's permanent director, according to reports.
The departures come after allegations of poor management at the agency.
The independent review followed a number of embarrassing security breaches.
Acting Secret Service Director Joseph Clancy will appear before the House Judiciary Committee next...
Dominic Adesanya, 23, will undergo more psychiatric testing and treatment.
A security contractor with an alleged criminal history was allowed to ride in an elevator with...
Lawmakers express deep concern with the Secret Service.
Issa and Cummings say review must go beyond fence-jumping episode.