Opinion | Why Civil Cases Have Been More Successful Against Donald Trump

To understand why the civil system has been so successful against Mr. Trump, it’s important to understand some differences between civil and criminal justice. Civil actions have a lower standard of proof than criminal ones. In the civil fraud case, Justice Arthur Engoron applied a “preponderance of the evidence” standard, which required the attorney general to prove that it was more likely than not that Mr. Trump committed fraud. (Criminal cases require a jury to decide beyond a reasonable doubt that the defendant committed a crime, a far higher standard.) As a result, it is much easier for those suing Mr. Trump in civil court to obtain favorable judgments.

These judgments can help — and already are helping — curb Mr. Trump’s behavior. Since Justice Engoron’s judgment in the civil fraud case, the monitor assigned to watch over the Trump Organization, the former federal judge Barbara Jones, has already identified deficiencies in the company’s financial reporting. After the second jury verdict in Ms. Carroll’s favor, Mr. Trump did not immediately return to attacking her, as he did in the past. (He remained relatively silent about her for several weeks before lashing out again in March.)

Returning to the White House will not insulate Mr. Trump from the consequences of civil litigation. As president, he could direct his attorney general to dismiss federal criminal charges against him or even attempt to pardon himself if convicted. He cannot do either with civil cases, which can proceed even against presidents. (In Clinton v. Jones, the Supreme Court held that a sitting president has no immunity from civil litigation for acts done before taking office and unrelated to the office. And as recently as December, the U.S. Court of Appeals for the D.C. Circuit made clear that even if the challenged acts took place during his presidency, when the president “acts in an unofficial, private capacity, he is subject to civil suits like any private citizen.”)

It may also be difficult for Mr. Trump to avoid the most serious penalties in a civil case. To appeal both recent civil judgments, Mr. Trump must come up with hundreds of millions of dollars in cash or secure a bond from an outside company. Although he managed to post a $91.6 million bond in the Carroll case, he initially encountered what his lawyers described as “insurmountable difficulties” in securing the half-billion-dollar bond he was originally ordered to post in the civil fraud case. An appeals court order last week cut that bond to $175 million — but if Mr. Trump cannot post this bond, Ms. James can start enforcing her judgment by seizing his beloved real estate or freezing his bank accounts. And even though it appears that he will be able to post the reduced bond, the damage done to his cash position and liquidity poses a significant threat to and limitation on his ongoing business operations.

Furthermore, through civil litigation, we could one day learn more about the inner workings of the Trump empire. Civil cases allow for broader discovery than criminal cases do. Ms. James, for instance, was able to investigate Mr. Trump’s businesses for almost three years before filing suit. And in the Carroll cases, Mr. Trump had to sit for depositions — an experience he seemed not to enjoy, according to Ms. Carroll’s attorney. There is no equivalent pretrial process in the criminal context, where defendants enjoy greater protections — most notably, the Fifth Amendment privilege against self-incrimination.