MS NOW host Stephanie Ruhle and Bloomberg Opinion columnist Tim O'Brien criticized Michael Boulos, married to President Donald Trump's daughter Tiffany, for being included in Secretary of State Marco Rubio's Middle East meetings.

"Are you kidding me!?” Ruhle said.

Trump biographer Tim O'Brien made clear on MS NOW Friday that he doesn't remotely buy the Trump administration's excuse for the recent series of suspiciously timed stock trades coming from within the White House that profited off major government decisions before they happened.

"Tim, let's start there," said anchor Antonia Hylton, quoting a statement from the White House: "'Neither President Trump, his family, nor the Trump Organization plays any role in selecting, directing, or approving specific investments.' So end of story. No more questions needed, right?"

Bloomberg reporter and former Donald Trump biographer Tim O'Brien thinks the one takeaway from the Supreme Court's argument over tariffs is that Chief Justice John Roberts may be trying to claw back the power the court handed to the executive branch.

Speaking to "The Weeknight," O'Brien said that he was keeping a keen eye on Roberts.

Sitting in with host Ali Velshi on Sunday after Donald Trump completed a press conference in Scotland with Ursula von der Leyen, president of the European Commission, one of the president's biographers called the Trump's answers, "profound ignorance" and demeanor "disturbing on a number of levels."

After host Velshi started the segment by blurting, "Wow. That was batcoop crazy," biographer and Bloomberg Opinion Editor in Chief Tim L. O'Brien looked equally distressed.

Donald Trump's biographer on Sunday highlighted what stood out to him about the president's financial data release.

Tim O'Brien, who spent massive amounts of time with Trump before writing TrumpNation: The Art of Being the Donald, appeared on MSNBC on Sunday to discuss the release.