Mitt Romney won a clean sweep in yesterday’s primaries. His delegate lead is now utterly and completely insurmountable. Rick Santorum, Newt Gingrich, and Ron Paul have no reason whatsoever to soldier on, save satiation of their own egos. Any and all future coverage of their campaigns should point out that fact.
It is long past time for the Republican party to unite for the fall campaign against President Obama. And there is absolutely no mathematical reason whatsoever for the party to refrain from doing so.