ant to the mandatory coverage of the categorically needy. The federal regulations governing Medicaid guarantee automatic enrollment in Medicaid upon qualification for AFDC and prohibit a state from requiring an additional Medicaid application from an individual receiving AFDC. 42 C.F.R. § 435.909(a) (1981). Plaintiffs, thus, have never filed a separate application for Medicaid.
In 1981 Congress, as part of the Omnibus Budget Reconciliation Act, P.L. No. 97-35, 95 Stat. 843, amended the AFDC Act to require that states include income of stepparents in determining a stepchild’s eligibility for AFDC. See 42 U.S.C. § 602(a)(31) (as amended). Prior to this amendment a stepparent’s income was not considered in the AFDC eligibility determination. The Medicaid Act specifically excludes stepparent’s income from eligibility determinations. 42 U.S.C. § 1396a(a)(17)(D).
Acting pursuant to this new AFDC provision, defendant in March 1982 began notifying plaintiffs, AFDC families containing stepchildren, that their AFDC benefits were being terminated. These notices also advised the families that their Medicaid benefits were ending. After many families were terminated, plaintiffs brought this action seeking to have their Medicaid benefits restored and to prevent further terminations.
Plaintiffs claim that the terminations were illegal because defendant failed to comply with federal regulations requiring the state welfare agency to redetermine eligibility on other grounds before termination. See 42 C.F.R. § 435.916(e) (1981). They admit that they are no longer automatically eligible for Medicaid as AFDC recipients. Nonetheless, they claim that most of them are still covered as categorically needy because stepparent income is an AFDC eligibility requirement specifically excluded from consideration in Medicaid eligibility.
Defendant responds that the regulations requiring a redetermination prior to termination do not apply to plaintiffs because they never independently qualified for Medicaid. Rather, defendant contends, the re-determination provisions cover only Medicaid recipients who applied for Medicaid directly and are not receiving it as a function of their eligibility for some other federal assistance program. Defendant argues that the proper course for plaintiffs is to make a new application for Medicaid.
The district court denied plaintiffs’ motion for a preliminary injunction. The court’s denial was based on its belief that any harm suffered by the plaintiffs could be avoided in the main by application for Medicaid benefits. The court conditioned its denial on defendant’s sending notices to all plaintiffs informing them of the reasons for their termination from AFDC and Medicaid and advising them that they could still apply for Medicaid benefits.
In determining whether to grant a preliminary injunction the court must consider four criteria:
“(1) [whether] plaintiff will suffer irreparable injury if the injunction is not granted; (2) [whether] such injury outweighs any harm which granting injunctive relief would inflict on the defendant; (3) [whether] plaintiff has exhibited a likelihood of success on the merits; and (4) [whether] the public interest will not be adversely affected by the granting of the injunction.”
Auburn News Co., Inc. v. Providence Journal Co., 659 F.2d 273, 277 (1st Cir.1981) (quoting
Planned Parenthood League of Massachusetts v. Bellotti, 641 F.2d 1006, 1009 (1st Cir.1981)),
cert. denied, 455 U.S. 921, 102 S.Ct. 1277, 71 L.Ed.2d 461 (1982). While each of these factors must be considered, “the probability-of-success component has loomed large in cases before this court.”
Auburn News Co., Inc. v. Providence Journal Co., 659 F.2d at 277.
At the appellate level our review is limited. The decision to grant or deny a preliminary injunction is generally left to the discretion of the district court, and we will reverse only if the district court abused its discretion or if the denial was based on a clear error of law. See Massachusetts Association for Retarded Citizens, Inc. v.