Good analysis — worth reading the entire thing.
Worst-case scenario for Republicans – CNN.com
Romney’s base problems were revealed in the fact that he lost North Dakota to Santorum, despite winning the state easily four years ago.
But it was Virginia that perhaps best revealed the depth of anti-Romney sentiment. Because of arcane and frankly idiotic ballot access rules, Romney had the Virginia ballot all to himself with the exception of Ron Paul. The Libertarian congressman won just 4.5% of the Old Dominion State vote four years ago. This year Paul won 40%, while Romney cleared 60%. That almost tenfold increase provided Paul’s best percentage showing of the night and served as a way of gauging just how committed some conservatives are to voting for someone other than Romney.