Mark Shields has it exactly right and adds a nice touch of history. I'm a liberal and liberals are challenged to oppose Romney--not because he's a Mormon but for his misguided policies. If Romney is nominated I will vote for his opponent. As a pluralist American Jew, who knows something about the legacy of anti-semitism, and about our awful treatment of Al Smith in 1928, we better not go backwards on something in America that we've improved on--as Shields makes clear.