Yes, it is. The Affordable Care Act (often called "Obamacare") was passed by congress in 2010, signed by the president, and then upheld by the US Supreme Court in 2012.
One law is Obamacare.
The Affordable Care Act.
Obamacare.
No. Illegal immigrants are not covered by the Obamacare law, and are neither subject to penalty for failure to obtain coverage, nor are eligible to purchase insurance from an Exchange (whether subsidized or not). They are also not eligible for Medicaid.
did any republicans vote for obamacare
The "ObamaCare" health insurance reform bill does not generally provide insurance itself, but requires people to have private insurance among other changes. Insurance will almost certainly not pay for breast augmentation, regardless of the recent changes in law.
ObamaCare (or, more properly, the PPACA) is not a insurance coverage plan. It is a legal regulatory framework concerned with making substantial changes to both the government-sponsored health plans (Medicare/Medicaid) and the private insurance plan market. Thus, you can't "buy Obamacare". In terms of the economic impact of the law, that's a complete unknown at this point. The law and changes are complex and far-reaching, and we won't have even a basic sense of the economic result until 2018 at the very earliest.
4.2 million people are currently enrolled in Obamacare
Yes, any law can be repealed or modified by another law, and any part of the Constitution can be repealed or modified by another Constitutional Amendment except those that specifically say they can't be.
4.2 million people are currently enrolled in Obamacare
The supreme court handles cases disputing the meaning of laws and if they are constitutional. The case regarding Obamacare is an example.
I'm writing this on March 9th, 2011. It was not repealed yet. Keep praying... It can not be repealed as it is the law of the land and upheld by the Supreme Court.