Akin is the GOP candidate. End of story. The MO voters will have to make the decision whether a verbal gaffe is more important to them than McCaskill who voted for Obamacare and does not want it repealed or voting for someone who voted against it and wants it repealed. In 2010 71% of Missouri voters voted against Obamacare in a referendum.
More likely, the end of story will be his concession speech.