As voters head to the polls in Arizona, Utah and Idaho on Tuesday, the world was rocked by deadly terror attacks in Brussels, which will undoubtedly force voters to consider who is best equipped to handle the threat of terrorism in the homeland.

While the five remaining candidates in the Democratic and Republican field have focused their platforms and stump speeches around economic issues, they are sure to pivot to terrorism and national security in the wake of the Brussels terrorist attacks, which have left at least 34 dead and hundreds injured.

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Donald Trump was the first presidential candidate to weigh in. In an interview with “Fox and Friends,” Trump called Brussels a total disaster and said we need to close U.S. borders, reiterating a call he has made after the Paris terrorist attacks in November and the San Bernardino, California, attacks in December. “I’ve been talking about this for a long time,” Trump said. “Brussels was a beautiful place. Zero crime, and now it’s a disaster city. It’s a total disaster and we have to be very careful, we have to be very vigilant as to who we allow into this country.”

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Then, in an interview with NBC’s “Today,” Trump said authorities interrogating the suspected mastermind behind the Paris attacks should “do whatever they have to do” to get information — including waterboarding.

Sen. Ted Cruz also made a statement regarding the attacks in Brussels, blaming an “extreme strain of Islam.” “Radical Islam is at war with us. For over seven years we have had a president who refuses to acknowledge this reality. And the truth is, we can never hope to defeat this evil so long as we refuse to even name it,” Cruz said. “That ends on January 20, 2017, when I am sworn in as president. We will name our enemy — radical Islamic terrorism. And we will defeat it.”

Cruz has proposed “carpet bombing” ISIS in Syria as a way to eradicate the terror network — a proposal that has drawn criticism as well as support.

Hillary Clinton took a different stance, saying it would be unrealistic to close U.S. borders, but she did call for the U.S. to strengthen security. “I think we’ve got to recognize that the threat posed by the modern incarnation of terrorism is one that we have to be vigilant against. I know that Americans have every reason to be frightened by what they see,” she said in an interview on “Good Morning America.”

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In the days after the deadly San Bernardino terror attacks, Trump didn’t waste any time in proposing a controversial plan to temporarily ban Muslims from entering the United States.

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What’s more, exit polling in New Hampshire, South Carolina, Michigan, Mississippi, Alabama and Virginia show that more 61 percent of Republican voters would support a temporary ban on non-American Muslims from entering the United States. It appears as though his controversial proposal set him apart from his other opponents in voting contests across the country.

Immigration and border security are hot-button issues in the 2016 presidential race and specifically in states like Arizona that vote on Tuesday.

Americans want straight talk and action when it comes to combating terror. The effect of ISIS and other extremist groups that commit acts of terrorism in the name of Islam have brought radical Islam to the forefront of American politics and Trump has capitalized on his aggressive stance among voters.