Rule 59.01.Grounds.

Rule 59.01 lists the grounds a party can raise in a motion for a new trial. A court can grant a new trial to some or all of the parties, and on some or all of the issues, if any of eight things happened: an irregularity in how the court, jury, or the winning party conducted the proceedings (or an order of the court, or an abuse of discretion) that kept a party from getting a fair trial; misconduct by the jury, the winning party, or that party's attorney; an accident or surprise that ordinary care could not have prevented; damages that look excessive or inadequate because passion, prejudice, or disregard of the evidence or instructions drove the verdict; a plain error in calculating the amount recovered, whether too high or too low; a verdict unsupported by enough evidence or contrary to law; newly discovered evidence that the moving party could not have found and produced at trial with reasonable diligence; and legal errors at trial that the party objected to at the time under the rules.

The list covers process problems (irregularity, misconduct, accident), substance problems (damages, insufficient evidence, legal error), and evidence that surfaced too late to use. A motion can rest on one ground or several, and the court can grant relief on part of the case rather than order a full do-over.