InsideHigherEd.com reports that members of the U.S. Senate appropriations subcommittee used their first formal opportunity to respond to President Bush’s budget to grill Education Secretary Margaret Spellings with probing questions. Spellings was pressed to explain some budget cuts that were described as “scandalous,” and “inadequate and disheartening.” She also was asked to explain why many student aid programs would be kept at their 2006 levels, or cut outright, at a time when tuition is increasing…