Has Donald J. Trump become a born-again Christian?

That is the suggestion of James C. Dobson, one of America’s leading evangelicals, who said Mr. Trump had recently come “to accept a relationship with Christ” and was now “a baby Christian.”

Dr. Dobson, the founder of Focus on the Family and one of the country’s most prominent social conservatives, gave his account at a meeting Mr. Trump had in New York on Tuesday with hundreds of Christian conservatives.

In an interview recorded at the event by a Pennsylvania pastor, the Rev. Michael Anthony, Dr. Dobson said he knew the person who had led Mr. Trump to Christ, though he did not name him.

“I don’t know when it was, but it has not been long,” Dr. Dobson said. “I believe he really made a commitment, but he’s a baby Christian.”