Out of His Mind

The rally comes at a precarious time for Mr. Trump, as his White House is reeling from personnel turmoil and has yet to score any legislative victories. On Tuesday, he accepted the resignation of his national security adviser, Michael T. Flynn, who had become embroiled in allegations that he had improper contacts with Russian officials before Mr. Trump took office. That was followed on Wednesday by the abrupt withdrawal of Andrew F. Puzder, the president’s nominee to be secretary of labor, amid allegations that he had abused his ex-wife and employed an illegal immigrant.

Mr. Trump’s return to the campaign trail on Saturday is unusually early. Even the midterm congressional elections for members of Congress are still 21 months away.