Homeland Security has its hands full preventing future terror attacks.

And while the Middle East and North Korea have been giving the United States much concern lately, Homeland Security Secretary John Kelly is also worried about a threat much closer to home.

He says he’s been staying up late every night, trying to make sure terror attacks don’t come across America’s southern border.

Fox News reported:

Homeland Security Secretary John Kelly warned Tuesday that the next terror attack could be committed by enemies sneaking through America’s southern border, as he defended the tough actions being taken by the Trump administration to secure the region. 

“I’m staying up late at night every night to try to prevent that from happening. So, that’s what keeps me … awake at night,” Kelly said of the terror threat.

Kelly also pointed out that much greater efforts are being made since Trump’s election to secure the U.S.-Mexico border and they are having measurable results.

Illegal immigration is estimated to have reduced as much as 70 percent just in the first 90 days of President Trump’s term.

Some of this reduction is likely due to Donald Trump’s strong rhetoric surrounding illegal immigration, specifically from Mexico, all throughout his campaign.

After assuming office, Trump followed through with a series of sweeping policy changes, leading to the arrest of more than 21,000 immigrants.

This is quite a spike in arrests compared to the 19,000 illegal immigrants detained in that time- period under previous president, Barack Obama.

However, there is much backlash to these policies.

Mainstream media continues to insist it is wrong for agencies like the Department of Homeland Security and Immigration Customs Enforcement (ICE) to arrest “illegal immigrants with no criminal history.”

Opponents of immigration reform and the Trump administration seem to forget that an illegal immigrant has already broken the law – entering the country illegally.

Despite the crackdown on those residing in the country unlawfully, Kelly still has concerns regarding terror attacks coming through our southern border.

In a Q&A following a speech at George Washington University, he addressed the push back against his policies and mistreatment of those carrying them out.

Fox News reported:

“I said it a lot back then, and I’m trying to do something about it now, that if there is — when there is another terrorist attack in our country, if it comes from outside the country, up until 90 days ago, I would say that that individual or individuals … get into the United States through the southwest border,” he said.

He also used the address to blast lawmakers who take shots at Homeland Security staff, whom he said are often mistreated in a way similar to police officers. He added that if lawmakers don’t like what they are doing, then lawmakers should change the laws they are following.

“[Employees] are often ridiculed and insulted by public officials and frequently convicted in the court of public opinion on unfounded allegations testified to by street lawyers and street spokespersons,” he said.

“If lawmakers do not like the laws that we enforce, that we are charged to enforce, that we are sworn to enforce, then they should have the courage and the skill to change those laws. Otherwise, they should shut up and support the men and women on the front lines,” he said.

While ICE and Homeland Security have been given more authority to arrest all illegal immigrants, and not just those who had already committed violent crimes (as was the standard under Obama), the border still needs to be more secure.

Will Trump’s “Build a Wall” initiative help achieve this?

Will Kelly’s late-night worries be founded when terrorists attempt to enter the nation through the networks in northern Mexico?

Time will tell as policies regarding illegal immigration and border security continue to be a priority in President Trump’s White House.