[Berman:] In the last two days, all the presidential candidates have weighed in on how they would fight terror. Some in ways are really hadn't heard before. More now, from Phil Mattingly.
[Phil Mattingly, Cnn Correspondent:] Terror and politics once again inextricably linked.
[Gov. John Kasich,  Presidential Candidate:] It not about patrolling neighborhoods. It's not about shutting our borders down.
[Mattingly:] GOP frontrunner Donald Trump saying when it comes to foreign policy, he will keep U.S. Enemies guessing.
[Donald Trump,  Presidential Candidate:] You know, we need unpredictability. The enemy. We have enemy. ISIS is an enemy. I frankly don't want the enemy to know how I'm thinking.
[Mattingly:] Going all in on the use of torture.
[Trump:] I think we have to change our law on, you know, the water boarding thing where they can chop off heads and they can drown people in cages and heavy steel cages and we can't water board.
[Mattingly:] And considering the use of a nuclear weapon against
[Isis. John Heilemann, New York Magazine Journalist:] You wouldn't rule out the possibility of using a nuclear weapon against ISIS?
[Trump:] Well, I'm never going to rule anything out.
[Heilemann:] Right.
[Trump:] And, I wouldn't want to say even if I felt it wasn't guard. I won't want to tell you that.
[Heilemann:] Right.
[Trump:] Because at a minimum, I want them to think maybe we would use it. OK.
[Mattingly:] Ted Cruz under pressure from New York City police officials.
[Unidentified Male:] In the statements he made today is why he's not going to country.
[Mattingly:] Defending his own proposals to increase patrols in the U.S., Muslim neighborhoods.
[Cruz:] Look it is that ostrich head in your sand political correctness that has made America so vulnerable.
[Mattingly:] Hillary Clinton challenging both in a sweeping foreign policy speech in California today.
[Hillary Clinton,  Presidential Candidate:] We can't let fear stop us from doing what's necessary to keep us safe. Nor can we let it push us into reckless actions that end up making us less safe.
[Mattingly:] Each candidate fighting for position in the wake of the western Tuesday contests. A day that saw Hillary Clinton come closer to locking up the Democratic nomination.
[Clinton:] I'm also very proud to have won Arizona tonight.
[Mattingly:] A delegate split in the GOP. Ted Cruz winning Utah and Donald Trump dominating in Arizona. Another primary night raising questions about the effectiveness of the stop Trump efforts. Cruz securing the endorsement of Former GOP Candidate Jeb Bush. Pointing to it as another sign the party is coalescing behind his candidacy.
[Cruz:] What we're seeing all across the country is the momentum is with us. And I tell you one of the things that shows that is this morning, Jeb Bush endorsed our campaign.
[Mattingly:] Phil Mattingly, CNN, Milwaukee.
[Berman:] All right joining me, CNN Political Commentator and Donald Trump Supporter Jeffrey Lord, CNN Political Commentator and Republican Strategist Ana Navarro and CNN Senior Political Analyst David Gergen. David, you heard about how some of the candidates are addressing the issue of terror right now. Donald Trump not ruling out nuclear weapons. Ted Cruz saying he wants to secure Muslim neighborhoods here. Look, they obviously are saying this for a reason. They think there is political gain here. What is it?
[David Gergen, Cnn Senior Political Analyst:] There is political gain. Americans feel shaky, they felt jittery. They are increasing sense of this terror these terror attacks are out of control. And they are looking for a strong man. That's what benefited Trump all along. So I think in the short term this will help him the most. I think the nature of his proposals, they sometimes get very wild. I think in the long run will play to Hillary Clinton's benefit, if she's tough.
[Berman:] Jeffrey Lord, how do you use nuclear weapons against terrorists?
[Jeffrey Lord, Trump Supporter:] Well, what he's really saying John, is something that's been done before in American history. Most definitely with Richard Nixon. It's called the mad man theory, seriously. It comes from Mack Valley. And basically what it says is, keep the enemy guessing as to what you will do or not do. Are you unpredictable? Make sure they see you as unpredictable. Richard Nixon was a devout believer in this. Talk about it frequently that he want the soviets in the day to think that he was a mad man capable of anything. Out of that came all sorts of his arms agreements, his trip to China, his opening with China because they he really felt he had used this wisely. That's in essence what Donald Trump is saying.
[Berman:] Is that, Ana, an essence what Donald Trump...
[Lord:] It's been before.
[Berman:] ... is saying? Is it being unpredictable, Ana or is it being unserious?
[Ana Navarro, Republican Strategist:] John, please don't ask me to interpret Donald Trump, I don't speak that language. Look, I just think that both Cruz and Trump are trying to argue each other on who can be tougher and crack down harder Muslims. They see Muslims as the enemy. They're trying to portray that. It has worked for Trump in the past. And I think, you know, Cruz is keenly aware that he is in a primary fight with Donald Trump. And, you know, it's about giving red meat to the base. And, you know, saying the things that make sense in a primary though may not make sense, if and when one of them becomes president.
[Berman:] It is interesting though a lot of...
[Lord:] Hey John?
[Berman:] ... what's being hang on one second Jeffrey, because a lot of us being said in the Republican side right now is in reaction to how President Obama is dealing with this most recent terror attack in Brussels. And some would say the lack of reaction by President Obama. He continued his trip to Cuba. He went to the baseball game in Cuba. He's now continuing his trip to Argentina and I have to show you some pictures of this just a short time ago. President Obama in Argentina, dancing, doing the tango. Hopefully we have that video there. There's the president. That's the president doing the tango, the President of the United States doing the tango. David Gergen not badly I should say. David Gergen, you know. As far as an image goes in the midst of terror fears after Brussels, is this the image the White House wants to send?
[Gergen:] Well, to be fair, the president has a belief that to shrink is the best thing he can do. He does not want to seem like he rushed into anything and, you know, that somehow he gets all shaken up and so he wants to hold back. He continually hold back. I happen to disagree with that especially in that and I think the people now after all these attacks, we've had an attack a day around the world for the last 12 days. But after San Bernardino and Paris and Brussels and Ankara and Istanbul, people are looking for more forceful action to actually drive back ISIS and right now we're not winning against ISIS. We have reduced the amount of territory that happened in Syria and Iraq but they've expanded elsewhere and we now learned through the Associate Press they trained up 400 fighters to go through Europe. Under those circumstances, I must tell you, I would tell the president, when you open your speech in Cuba to the Cuban people and a 38-minute speech, you only get 50 seconds to Brussels. You're really underplayed. You sort of brushed it off. When you go to a baseball game it looks like a frivolous when you're dancing like that. So, yeah, I even get the hard call. You should have thought about coming back and gathering ordinary people are looking for leadership here. I think that's a critical issue for him. The restraint does not equal leadership when you are under attack like this.
[Berman:] We haven't confirmed the exact detail by the way of 100, you know, 400 fighters going to Europe right now but the idea that ISIS is sending fighters...
[Lord:] John?
[Berman:] ... is something we have reported. Jeffrey, go ahead.
[Lord:] By chance just the other day, right before the Brussels attack, Former British Prime Minister Tony Blair gave an interview to the BBC and he was talking about this very issue. And he said that when people are forced to choose between what they see as liberalism that was flexible and not assertive versus a hard line position that they inevitably when faced with terror will go straight to the hard liner. I really do think that's what you're seeing here. I mean, he said this before all of this transpired, but I think he was right about it.
[Berman:] Ana, I have to give you the last word right now and, you know, a 15 seconds or less. The president is dancing the tango. Your thoughts?
[Navarro:] I think the entire thing is horrible. It reminded me of when he went golfing right after James Foley's head was cut off. Look, I think it's inexcusable that when the entire world is standing in solidarity with Brussels is in shock, is in grief. The President of the United States is in Cuba sitting next to a dictator who has been in power for 56 years who has ordered the shoot down of American citizens, who has been anti-American for 56 years eating peanuts and going to the baseball game like he was Walt Disney. It's not Walt Disney and it's a day of grief for the entire world. I think President Obama knows full well that the optics matter but he chose his legacy over optics. And I think it was a shameful, shameful disappointing moment for President Obama. I was disappointed. I was not surprised.
[Berman:] All right, Ana Navarro, David Gergen, Jeffrey Lord, thank you so much. Just ahead, our top story and why specifically Belgium is such a hot bed for terror.