HE'S SORRY: JPMorgan Chase CEO Jamie Dimon plans to apologize before members of Congress on Wednesday for a trading loss of more than $2 billion.

BACKFIRE: Dimon plans to say that JPMorgan Chase mounted a companywide strategy to reduce risk in December 2011, but that it added risk instead.

REGULATORY IMPACT: The trading loss has revived Democrats' push for stricter oversight of Wall Street banks. Some Democrats have contended that the trades in question would have violated the so-called Volcker rule, which will bar large banks from making bets for their own profit. It takes effect in July.