Today, a Florida federal judge ruled Obamacare "unconstitutional". In doing so, he stated and supported President Obama's own position in 2008. Obama thought it was a lousy idea back then, too. In fact, that was the key difference and campaign selling point against his then primary challenger Hillary Clinton.

Her health care reform required mandates. His didn't.
“I note that in 2008, then-Senator Obama supported a health care reform proposal that did not include an individual mandate because he was at that time strongly opposed to the idea, stating that ‘if a mandate was the solution, we can try that to solve homelessness by mandating everybody to buy a house,’” Judge Vinson wrote in a footnote toward the end of the 78-page ruling Monday.