Transcript for Trump lashes out at Canada's Trudeau after G-7 summit

So this photograph of world leaders from the g7 summit kind of captures the mood of how it went. The guy in the white house showed up late, left early, slammed our allies and refused to sign a joint agreement that his own people helped write. So the question is, why go? I mean, we pay for the fuel and everything, but, you know, if you are not going to do anything, why did you go? "State of the union," kudlow who was his adviser who was working on this said he did attend in good faith, but after Justin Trudeau said he was insulted by some of the things that the president said, in reaction to that statement that trump then sort of started tweeting out, you know, all these things and disparaging statements against our allies. I just -- fear that we have a president that is so temperamental that can't seem to control himself -- Right. -- For true diplomacy, he is probably incapable of doing. Why would you throw all that work away because you're reacting to something that someone says? I was really troubled by some of the things his adviser said and he said. We called the prime minister of Canada, the president of the United States, his advisers called him weak, dishonest, a back stabber. I mean, you know, just -- oh, and that there was a special place in hell for Justin Trudeau. Yes. I thought that was just so personal. Attacks against the prime minister of our neighbor. We're not talking gaddafi or Castro or Ortega. Yes. We're talking Canada. When I think it gets really wheezy, when you get into the economics of the tariffs because I tried to see, was there a point? Are we getting as trump would say, screwed by something? The biggest problem for me was the optics. You have him going to this summit and pretty much flipping a middle finger to many allies and he says, why isn't Russia here? Then he flies to meet with Kim Jong-un. You look at all of this, and even if there was a campaign promise buried in there, very hard to see when the optics look like he has forgotten where we were supposed to hold hands, he started punching. I was actually messaging our executive producer yesterday because I have been so upset, deeply upset, over the idea that we would possibly let Russia back into the g8 -- g7. I think people need to understand that in 2014, Russia annex crimea, which was part of the Ukraine, it was the first violation of eurean borders since World War II. There is blood lust for the soviet union, and he is going to try to expand every way possible and undermine democracy. We americans in the g7, with our allies, Germany, France, the United Kingdom, we do not stand for tyranny. We do not stand for dictatorship, for killing journalists, forilling people who speak out, and I implore everyone, because I think we need a history lesson, and maybe our president does too. In 2014, look at the opposition protests in kiev. Ukraine doesn't want to be part of Putin's regime. They want freedom. Do we as Americans believe in freedom and democracy in Europe, or do we believe in tyranny and dictatorships where you can just kill people at any moment? For me, I'm not seeing a lot of leadership in the Republican party, and I don't know where I came from Mr. Gorbachev, tear down this wall, to a dictator. Putin is not our friend, and he is not the president's buddy. He is a thug, to wage a shadow war against America, and our leader should act like it. That was said. He also said, I will not violate international law and go into crimea. Why go into any agreement? You cannot trust him. Remember what your dad said? To our allies, my partisan majorities of Americans remain pro-free trade, pro-globalization and supportive of allegiances -- Alliances. 70 years of shared values. Americans stand with you, en if our president doesn't. Yeah. And you see -- I trail agree with the sentiment that John is expressing there, but I'm not sure that's true anymore. That a bipartisan majority -- certainly not a majority of Republicans, and if they do, they are standing there or they are sitting there in silent complicity to your point. They are not speaking out, and I was scrolling through the Twitter feeds of the major leaders in foreign policy in the U.S. Senate, and practically none of them said boo about the fact that we are embracing Putin. Alienating -- Attacking our allies. As far as you were talking about the actual tariff issue, we have a trade surplus of billions and billions of dollars with Canada. $8.4 billion to be exact. Nd with Russia. Yeah. It's just -- it's bizarre to me because again, and I think -- Ana, you and I, when you are raised and bred on a certain set of values that you commit to and love, and it's the way that I view the world -- Mm-hmm. -- I believe in freedom on a very basic level. I believe in freedom internationally, and the idea that we would be okay, and insinuate we won't be pro-democracy in Europe becau we have a pact or trump has a deal with Putin, it is a bizarre universe for me to live in, and it is petrifying going forward in our role globally, and what it means for the expansion. Putin is getting everything he wants. He is probably laughing his face off, and he is getting more powerful. Why engage in the cold war? It's closer to home than democracy in crimea. It's democracy in the united States. He hacked our elections. He tried to do the same thing in France ande tried to do the same, you know, in Germany. This is the question why. Why is trump beholden to Putin? Why? That's the question that we all need to be asking ourselves. I agree with, that but I also think that we can't --T's exhausting for me because, again, when you are traditionally up until two years ago, and a conservative, you believe X, Y and Z in regards to foreign policy, and it's now shifting. I'm not shifting. When we sit here as the Republicans on the table, like, I can't change the world view I was raised on, and I believe in. But you know what? Many -- many folks in your party seem to be able to, and that's the question you both are asking. Foreign policy. Family values. And it is a very important question. This is not going anywhere because, you know, the bigger picture is, what does it mean for us as a nation and who we think we are? Yeah. As oosed to now who we are told we are.

This transcript has been automatically generated and may not be 100% accurate.