Trump did order the Justice Department not to defend Obamacare and yes, California and other states do have standing. If Obamacare is truck down their Medicaid funding goes with it. That represents damages enough for them to have standing.
I don’t see this case going anywhere unfortunately. Congress does have to fix the ACA. There isn’t enough choice of plans. As a retiree on a non medicare retirement plan I don’t need birth control or prenatal care but because the ACA requires all plans have it, I pay for it. No wonder premiums and deductibles are high.
Defense of Medicaid funding (socialism) is a shabby case.