Whoch Web sites get the most traffic? According to the ranking service Alexa, the top three sites in the United States, as of this writing, are Google, YouTube, and Facebook. (Porn, somewhat hearteningly, doesn’t crack the top ten.) The rankings don’t reflect everything—the dark Web, the nouveau-roche recluses harvesting bitcoin—but, for the most part, people online go where you’d expect them to go. The only truly surprising entry, in fourth place, is Reddit, whose astronomical popularity seems at odds with the fact that many Americans have only vaguely heard of the site and have no real understanding of what it is. A link aggregator? A microblogging platform? A social network?

The investigation into Russian meddling in the 2016 election has expanded to include President Trump’s family business, with the special counsel, Robert S. Mueller III, subpoenaing the Trump Organization for documents related to Russia.

For more than 30 years, Mr. Trump has repeatedly sought to conduct business in Russia. He traveled to Moscow in 1987 to explore building a hotel.