White House officials pushed back Monday against critics of the Trump administration’s “zero tolerance” immigration policy. The policy has led to the separation of children from their parents at the U.S.-Mexico border. >> Read more trending news Update 12 p.m. EDT June 18: U.S. Attorney General Jeff Sessions on Monday said authorities don’t want to separate children from their families but that officials have a duty to prosecute people who illegally cross the border. “When we ignore our laws at the border we obviously encourage hundreds of thousands of people a year to likewise ignore our laws and illegally enter our country, creating an enormous burden on our law enforcement, our schools, our hospitals and (our) social programs,” Sessions said Monday during the National Sheriffs’ Association Annual Conference in New Orleans. He framed the issue as a debate over “whether we want to be a country of laws or whether we want to be a country without borders.” “President Trump has said this cannot continue,” Sessions said. “We do not want to separate parents from their children. If we build the wall, if we pass legislation to end the lawlessness, we won’t face these terrible choices. We will have a system where those who need to apply for asylum can do so and those who want to come to this country will apply legally.” Sessions’ arguments echoed those of President Donald Trump, who has blamed Democrats for passing laws that he said led to the separations. There are no laws mandating the separation of children and parents at the border. Homeland Security Secretary Kirstjen Nielsen said earlier Monday that officials will not apologize for enforcing immigration laws. 'We have to do our job,' she said. Original report: President Donald Trump defended his administration’s “zero tolerance” immigration policy on Monday, writing in a series of tweets that children are being used “by the worst criminals on earth” to get into America as critics slammed the policy for separating children from their parents. “Children are being used by some of the worst criminals on earth as a means to enter our country,” Trump wrote. “Has anyone been looking at the Crime taking place south of the border. It is historic, with some countries the most dangerous places in the world. Not going to happen in the U.S.” The president pointed to a rise in crime in Germany as an example of the chaos caused by illegal immigration, writing in a tweet that it was a “big mistake made all over Europe in allowing millions of people in who have so strongly and violently changed their culture.” However, Germany’s internal ministry reported last month that criminal offenses in the country were at their lowest since 1992, according to Reuters. This spring, the Trump administration ordered prosecutors to charge every person illegally crossing the border. Children traveling with the adults have been separated and placed in detention centers, prompting protests nationwide. The president has blamed Democrats for not fixing the law that allows for the separations. “Tell them to start thinking about the people devastated by Crime coming from illegal immigration,” the president wrote. “Change the laws!” Despite his claim that Democrats are at fault for the situation, The Associated Press reported that the Trump administration “put the policy in place and could easily end it.” The Associated Press contributed to this report.