Donald Trump, Hillary Clinton Urge End to Terrorism After Istanbul Attack

— -- The two presumptive presidential nominees today weighed in on the terrorist attack at the main international airport in Istanbul, Turkey, that claimed the lives of at least 36 people and injured 147 more.

Speaking at a campaign event in St. Clairsville, Ohio, GOP candidate Donald Trump began his remarks by addressing the attack.

"There is something going on that’s really, really bad,” Trump said. “Alright, it’s bad. And we better get smart. And we better get tough. Or we are not going to have much of a country left.”

Trump added, “We have to take care of the ISIS situation. And I’ll tell you, they are spreading, they are spreading like wildfire. ISIS is spreading, ISIS is getting our youth, getting people from various countries, many countries, they use the internet better than we do. They are converting people to join ISIS. And you know why? Because these young impressionable people they see what’s going on, and they see the way ISIS is treating us, and they say, ‘Wow isn’t that wonderful, that’s who I want to be with.’ We have to do things where they don’t feel so good about themselves anymore, folks."

Before his speech Trump tweeted about keeping terrorism outside U.S. borders:

In a statement, Democratic candidate Hillary Clinton declared that “all Americans stand united with the people of Turkey against this campaign of hatred and violence.”

“Today’s attack in Istanbul only strengthens our resolve to defeat the forces of terrorism and radical jihadism around the world,” Clinton said in a statement. “And it reminds us that the United States cannot retreat. We must deepen our cooperation with our allies and partners in the Middle East and Europe to take on this threat.”

ABC News’ Meghan Keneally and Julia Jacobo contributed to this report.