As Washington lawmakers react to the unfolding events in the Boston bombing investigation, a handful of senators involved in immigration reform debated whether the attack should impact the legislative efforts. "Given the events of this week, it's important for us to understand the gaps and loopholes in our immigration system," Sen. Chuck Grassley, R-Iowa, said in an immigration hearing in the Senate Judiciary Committee. Grassley is the top Republican on the committee, which is starting to review the comprehensive immigration reform bill drafted by a bipartisan team of eight senators. "While we don't yet know the immigration status of the...