The Republican nominee was quickly escorted from the stage during a speech in Reno, Nev., as security personnel responded to a perceived threat in the audience.
The punishment includes, in some cases, suspensions without pay for improperly reviewing records about Utah Rep. Jason Chaffetz. An employee who leaked data to the press has resigned.
After ignoring orders to drop his gun, the man was shot by a Secret Service agent outside a White House checkpoint on Friday afternoon. No other people were injured, according to the Secret Service.
The city's police are buying riot gear and bringing in officers from other cities to prepare for a political convention that could draw protesters from across the political spectrum.
In the past decade, 143 security breaches or attempted breaches have taken place. The committee suggested the scope of the agency's duties be reviewed to determine what "missions can be shed."
Omar Gonzalez, 43, has been in prison since last September, when he ran onto the grounds of the presidential residence and entered a White House door on a Friday evening.
A person flying a small drone-like device too close to the White House was taken into custody. It's another in a line of security instances around the White House.
A senior manager is on leave from the Secret Service, after an employee he supervised reportedly told investigators that he assaulted her by making forceful and unwelcome sexual advances.
The Secret Service, said Rep. Jason Chaffetz, is refusing to allow his committee to interview two agents involved in the investigation of a potential bomb near the White House.