Jeremy B. Merrill

This list documents all the verbal attacks Mr. Trump posted on Twitter, from when he declared his candidacy in June 2015 to Jan. 8, when Twitter permanently barred him.

By Kevin Quealy

Growing numbers of computer science students are getting caught plagiarizing code, either from classmates or from someplace on the web.

By Jess Bidgood and Jeremy B. Merrill

The president-elect’s three eldest children have always interwoven family and business ties. Can their empire ever be separate from the White House?

By Matt Flegenheimer, Rachel Abrams, Barry Meier and Hiroko Tabuchi

The reason you saw a particular campaign ad on Facebook may have nothing to do with your political views, or even your demographic profile.

By Jeremy B. Merrill

Take these steps to discover how the social network categorizes your political leanings.

By Jeremy B. Merrill

Donald J. Trump’s personal letters, alternately admiring and acidic, offer an archive of his emotional states and have become mementos for hundreds of recipients.

By Michael Barbaro

A quick trip to the city was a bureaucratic barrel roll, evading a monthlong wait for the Cessna Citation X to be allowed to take to the skies again.

By Jeremy B. Merrill

Fewer babies born in 2015 share a name with the current leading presidential candidates than they have in previous decades, suggesting few parents are inspired enough to name their offspring Hillary, Donald or Bernie.

By Jeremy B. Merrill

Mr. Trump submitted a new registration after selling his Cessna plane, which had been grounded by the Federal Aviation Administration, to a company he controls.

By Susanne Craig and Jeremy B. Merrill

A look at Mr. Trump’s airplanes and helicopters suggests that their value rests chiefly in their marketing potential, with the candidate’s stamp of status masking an aging fleet.

By Susanne Craig