Donald Trump’s civil fraud trial is resuming with ex-CFO Allen Weisselberg on the witness stand

As Donald Trump’s longtime finance chief, Allen Weisselberg helped spare his real estate empire from its last existential threat, staving off insolvency after casino bankruptcies and an airline failure in the 1990s.

Now, after a recent jail stint for tax fraud, Weisselberg is front and center again — set to testify Tuesday in the civil trial in New York Attorney General Letitia James’ fraud lawsuit against the Republican former president and his company the Trump Organization.

Weisselberg, also a defendant in the lawsuit, is expected to testify about his role in preparing Trump’s annual...