"That is our principle responsibility," Jeh Johnson said.
Nations including Afghanistan and Iraq saw elevated numbers of citizens overstaying their time.
The Obama administration arrested scores set for deportation over the weekend.
Ex-Secretaries Napolitano and Chertoff called the current process "thorough and robust."
Lawmakers say they've been kept in the dark as the DHS reorganizes its departments.
Lawmakers punted on the controversial data-sharing bill in August.
We need to focus on the largest trading block in the world and tap its remaining potential.
A recent case in Arizona proves the problem is too costly to ignore.
House Homeland Chairman McCaul will release a draft bill giving DHS a key role on cyber sharing.
"We haven't made the case strong enough," Jim Jordan said of immigration order opposition.
Steny Hoyer also argued that defunding immigration actions won't work.
"The fact remains we're four very short days away" from a shutdown, he said.
Dems are questioning the election-year timing of the operations.
Raids are "cruel reminder of a discredited policy," says Rep. Luis Gutiérrez.
The Department of Homeland Security feared backlash, according to a news report.
Secretary Jeh Johnson's recent remarks emphasized the administration's attempts to strike a balance...
The bill is part of a broader push among lawmakers to clarify the agency’s role.
Obama should not defer to future presidents, since leadership is needed now.
The government can now keep pace with innovation trends in commercial sectors.
Once your party's platform is nothing more than a projection of atavistic fears, you can't suddenly...
"I see nothing else happening other than a clean bill," she said.
Anti-government sentiments threaten the very fabric of the American social compact.
Sen. Harry Reid said Democrats will seek an "overwhelming vote" in favor.
"They all work in your states," he said of the 100,000 workers who could be affected.