Trump shadowed by Texas massacre during Asia trip

In South Korea a reporter asked the president about instituting "extreme vetting" for people who want to buy guns.
2:33 | 11/08/17

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Transcript for Trump shadowed by Texas massacre during Asia trip
President trump, meanwhile, in South Korea, overseas, faced now with the worst mass shooting at a church here at home ever. Last week, after the deadly truck attack here in New York City, the president within hours calling for extreme vetting. He was asked today if extreme vetting on guns would have caught this guy. Here's ABC's chief white house correspondent Jonathan Karl, traveling with the president. Reporter: Traveling in Asia, the president was asked whether, in light of the Texas massacre, he would favor the kind of extreme vetting he wants for immigration for those who want to buy guns. The answer? A definitive no. If you did what you're suggesting, there would have been no difference three days ago. And you might not have had that very brave person who happened to have a gun or a rifle in his truck go out and shoot him and hit him and neutralize him. Reporter: The president insisted tougher background checks could have made the Texas church shooting worse. And on the North Korea threat, a dramatic change in tone from the president. Even expressing hope about talks with North Korea, something he recently called a waste of time. I really believe that it makes sense for North Korea to come to the table and to make a deal that's good for the people of North Korea and the people of the world. I do see certain movement, yes. But let's see what happens. Reporter: Quite a shift for the president, who not long ago said this. They will be met with fire, fury and, frankly, power, the likes of which this world has never seen before. Reporter: And while he continued to boast about America's military dominance, he acknowledged war would be bad for everyone. We have many things happening that we hope -- we hope -- in fact, I'm go a step further, we hope to god we never have to use. Jonathan Karl with us tonight from Seoul. And Jon, the president in Asia, of course, dealing with north Korea there, but also the mass shooting here at home. And Jon, when it comes to this suspect, despite that domestic violence conviction, that escape from a mental facility, the president insisting that extreme vetting would not have worked? Reporter: Yeah, David. You heard him say it, but the bottom line is, there are bipartisan calls in congress to strengthen the background check system, including John Cornyn, a prominent Republican in the senate, saying he want as new law strengthening the current background check system. David? Jonathan Karl reporting on the president's trip in Asia.

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

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