Judy Woodruff:

But first: These past couple of years have been a kind of turning point for public attitudes about some tech and social media giants. It's led some to ask broader questions about monopolies, power and competition.

At his confirmation hearing this week, William Barr, the nominee to be attorney general, told senators — quote — "A lot of people wonder how such huge behemoths that now exist in Silicon Valley have taken shape under the nose of the antitrust enforcers."

That's part of the focus of tonight's report from our economics correspondent, Paul Solman.

It's for our regular feature Making Sense.