JUDY WOODRUFF:

We return to the debate over guns in the United States, a conversation taking place across the country this week, sparked by the tragedy in Las Vegas.

Last night, we spoke with Senator Richard Blumenthal, a Democrat from Connecticut.

And, tonight, I'm joined by Republican Senator James Lankford of Oklahoma. He serves on the Senate Homeland Security Committee, among others.

Senator, welcome back to the program.

I know you're hearing the conversation about what the shooter used to increase the capacity of these weapons that he used to kill so many people, the so-called bump-stocks. Some Republican leaders in the Senate are saying they want to take a look at that. What is your view?