Al Hunt editorializes in support of The DISCLOSE Act here.

Mr. Van Hollen is optimistic the measure can clear the House by early summer, in time for the midterm elections. It’s a tougher slog in the Senate. Mr. McCain, who for the past decade would have been leading the charge, is hiding, fearful of his tough conservative primary challenge in August.

It will be up to disclosure advocates like Maine’s Republican senators, Ms. Snowe and Susan Collins, to buck Mr. McConnell’s likely efforts to block this measure.