Since hundreds of millions of Americans labor each day to provide for themselves and their families, why does it seem as if the U.S. Department of Labor works only for the roughly 7 percent of private-sector workers who are union members?

That’s just one of several important questions that lawmakers should ask at this morning’s confirmation hearing for Rep. Hilda Solis, President Barack Obama’s nominee for Secretary of Labor. (The hearing is before the Senate Health, Education, Labor and Pensions Committee at 9:30 a.m. in the Dirksen Senate Office Building).