There is no way you can defend Obamacare. Here is a quick lineup of your possible defenses and how easily they are overcome.
Obamacare is 'the law of the land' -- 'If so, then why does Obama keep unilaterally rewriting it ?'
Obamacare is working to bring healthcare to the uninsured -- 'at the expense of working men and women of all income levels'
Obamacare just needs to be 'tweaked' and Repubs wont let us -- 'maybe if Democrats read it before passing it, it wouldn't need tweaking'
Obamacare is a Republican idea spawned by 'The Heritage Foundation' -- 'Last I knew, THF is not an elected body, and they cant pass laws'
Obamacare is failing because of greedy insurance companies -- 'Democrats wrote the law, the insurance companies are simply following it'
Obamacare needs to be transitioned to single payer -- 'Democrats can't run a system with less than 5 million users, yet they think they can run a system including every man, woman and child in the United States'
All Republicans want to do is repeal Obamacare, not fix it -- 'No Obamacare is less hazardous to your health than keeping Obamacare'
Y'all Racists ! -- 'Yawn.'