Attorney General Jeff Sessions said Saturday it "makes no sense" that sanctuary cities want to fight the federal government to prevent detention of illegal immigrants.
Sessions said that voters in those areas must hold their local government accountable to keep their cities safe.
"We're going to put pressure on these cities," he said on "Justice with Judge Jeanine." "We're going to battle them every step of the way."
Sessions said he will stand firm on his plan to withhold grant money from cities that do not abide by federal immigration laws.
He said some police departments do not necessarily agree with their orders to ignore ICE detainers, but must operate at the pleasure of the mayor.
"They think this is crazy," Sessions said.
Earlier this week, Sessions said illegal immigrant criminals and drug cartels are turning American cities into "warzones."
"It is a direct threat to our legal system, peace and prosperity,” he said in Nogales, Ariz.
Sessions also commented on foreign policy, warning that the increasingly volatile regime in North Korea is unpredictable.
"[Dictator Kim Jong-un] is seriously delusional, seriously crazy, and would seriously use whatever weapon he can get his hands on," Sessions said.
Watch the "Justice" interview above.