4th Circuit on Tuesday to hear oral arguments in case
Illinois health group accused of violating ACA
State had been among five without gay nuptials lawsuit
ACLU, others seek to file briefs in case
Former U.S. solicitor general filed brief with 4th Circuit
ACLU, Lambda Legal allowed to intervene in case before 4th Circuit
Anti-gay Alliance Defending Freedom files brief with federal appeals court
Victory brought ‘return of marriage equality in California’
Cases brought this week in Arizona, Florida and Indiana
Federal appeals court to hear case in May