John Hinderaker: " Barring a surprise in Florida, Republican primary voters and caucus-goers on mega-Tuesday will face a stark but classic political choice: do they go with Romney, whose views across a broad range of issues are more palatable to conservatives and whose economic expertise may be badly needed, or with McCain, who seems pretty clearly more likely to prevent the Clintons from re-inhabiting the White House? It's not an easy choice." Look at it this way: McCain may have a conservative problem, but Romney has an independent problem. The question is whether Romney's ability to shift and attract independents in a general election is greater to or equal than McCain's ability to hold a majority of conservative voters in a general. That's a tough question to answer. We do know that Romney is able to change messages with ease in order to cater to different constituencies, however.