A law that reshaped the accounting industry after a wave of corporate scandals is being challenged on constitutional grounds by pro-business conservatives.

Their big-guns legal team includes Kenneth Starr, best known as the special prosecutor in the Monica Lewinsky affair. Bitterly opposed to the sweeping anti-fraud law, they are challenging the board it established to oversee the accounting industry, arguing that it violates the Constitution’s mandated separation of powers among the three branches of government.