"The only alternative that Obamacare's critics have is, well, 'let's just go back to the status quo,'" said President Obama recently, "because they sure haven't presented an alternative."It's an argument Democrats make all the time to divert attention from the ongoing problems of their troubled national health care scheme. But still, why haven't Republicans presented an alternative to Obamacare?GOP leaders would protest immediately: They have come up with dozens of health care bills, only to see them rejected by Democrats. But the fact is, Republicans have not united behind a single health care proposal.