If nothing else, Donald Trump is the presidential field’s greatest emotional multitasker.

When news of Nancy Reagan’s death broke on Sunday morning, the GOP frontrunner for Tweeter-in-Chief immediately ripped New York Times columnist David Brooks as “the dumbest of them all” on Twitter. Then, a minute later, he posted a no-doubt heartfelt tribute to the fallen former First Lady, using one of his six go-to adjectives, “amazing.”

A minute after that, he shifted back into ninth gear, blasting the plaintiff in the civil case against his Trump University.

Also Read: Nancy Reagan, Former First Lady, Dies at 94

The real estate mogul was busy on Sunday morning, making appearances on “Face the Nation,” “Fox & Friends” and the Trump National Doral golf tournament, as well as tweeting with the speed of a 14-year-old as he went from insolent to inconsolable to insulting in rapid succession, like a house DJ of emotion.

Five minutes later, Trump was able to find the emotional strength to call rival for the Republican nomination Marco Rubio a “fraud lightweight.”

Read the tweets below.

David Brooks, of the New York Times, is closing in on being the dumbest of them all. He doesn’t have a clue. – Donald J. Trump (@realDonaldTrump) March 6, 2016

Nancy Reagan, the wife of a truly great President, was an amazing woman. She will be missed! – Donald J. Trump (@realDonaldTrump) March 6, 2016