In exercising its discretion, the court shall consider whether the intervention will unduly delay or prejudice the adjudication of the rights of the original parties.
Iowa. R. Civ. P. 1.407
COMMENT: The amendments to former Iowa R. Civ. P. 75, now rule 1.407, adopted provisions substantially similar to Fed. R. Civ. P. 24 and allow the trial court more discretion in determining whether to allow intervention.