Subsection (a)(2)(i) requires a court to decide whether determination of the rights of the parties before it would impair or impede an absent party's ability to protect its interest in the subject matter of the litigation. Fed. R. Civ. P. 19(a)(2)(i). Mere presentation of an argument that issue preclusion is possible is not enough to trigger Rule 19(a)(2)(i). Rather, it must be shown that some outcome of the federal case that is reasonably likely can preclude the absent party with respect to an issue material to the absent party's rights or duties under standard principles governing the effect of prior judgments.
Issue preclusion applies only to persons who were either parties to the prior action or shared the same interest as the parties who were present in the prior action. See Challenge Homes, Inc. v. Greater Naples Care Ctr., Inc., 669 F.2d 667, 670 (11th Cir. 1982) ('Because [the absent party] is not a party to this suit and will not have an opportunity to litigate his involvement in the questioned transaction, he will not be legally bound by the judgment under principles of res judicata or collateral estoppel.'); 18 Wright et al., § 4449, at 411 ...