By New York Times Editorial Board

Midway into a three-and-a-half-hour congressional hearing this week featuring Mary Jo White, the chairwoman of the Securities and Exchange Commission, none of the legislators had bothered to ask if or when her agency would require that corporations disclose their political spending.

The bipartisan silence testified to the growing importance to both parties of anonymous campaign donations.

Investors are clamoring for disclosure via petitions and letters to the S.E.C.

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