"Donald Trump suggested someone kill Sec. Clinton," Rep. Eric Swalwell said.
The incident is the second involving agents protecting Sanders this week.
The signs went up last month.
A gun, badge and other sensitive items were stolen from an agent's car.
Obama said agents managed security "flawlessly" during a busy week.
The texts were allegedly sent after an event with first lady Michelle Obama.
U.S. Park Police identified the man as Ryan McDonald, 39, of Vacaville, Calif.
Joseph Clancy said he didn't learn agents allegedly drove onto the lawn for five days.
"Let’s just change procedures," Rep. Sheila Jackson Lee said.
David Nieland stepped down in August after a Florida prostitute said he paid her for sex.
Secret Service cybersecurity expert says information sharing is best offense.
Rep. Bennie Thompson (D-Miss.) said Friday that the probe was insufficient.
"What I saw in 1990s sickened me," Gary Byrne said.
Marla Maples and Tiffany Trump say they likely getting agency guards.
At least one person is dead after the crash in New Hampshire.
Carson will be called "Eli" and Trump will be called "Mogul."
Congress's lack of accountability should not lead to another reshuffling of deck chairs.
As many as five dozen agents lacked clearances, The Washington Post reports.
The video shows the agents' vehicle knocking over a traffic barrier.
The request comes after a series of security lapses.
Some were serious, some were salacious.
Gonzalez's lawyer said the accused fence jumper is competent to stand trial.
The accused fence jumper is also charged with resisting officers and violating a gun law.
The bipartisan leaders of the House Judiciary Committee went after the Secret Service on Thursday.