Aetna announced Wednesday that it would stop offering ObamaCare health insurance coverage next year in Delaware and Nebraska, the only two states where it is still participating in the Affordable Care Act's individual insurance market. Aetna had already announced it was pulling out of Virginia and Iowa after exiting several other states in 2016. Rival insurers Humana and UnitedHealth Group also have dropped out of most of the government subsidized individual health insurance exchanges. House Republicans voted last week to repeal and replace key elements of ObamaCare, although the measure faces tougher opposition in the Senate.