The president's tweet was short: "FAKE NEWS," he wrote on Thursday. "THE ENEMY OF THE PEOPLE!"
Joshua McKerrow's response was long.
"Today I did the annual story on holiday decorations at the Governor's residence," the Maryland photojournalist wrote, starting off on a seemingly cheery note. "I've done it every year, for years. A very light but very fun story."
In years past, McKerrow said, he worked with reporter Wendi Winters. This year, he was paired with Selene San Felice.
"Wendi was murdered in June," McKerrow wrote.