Ron Paul is surging in Iowa according to the latest polls, but if the libertarian Texas Republican does become the flavor of the week, his foreign policy views will likely leave Republican voters with a sour taste. The latest IBD/TIPP survey asked respondents which GOP presidential candidate they preferred on four issues: the economy, budget/taxes, health care and foreign policy. Paul is third behind Mitt Romney and Newt Gingrich, being the preferred choice by Republicans on the first three issues by margins of 9%, 10%, and 6%, respectively. As today’s IBD story touched on, Paul is weakest on foreign policy,...