BUSINESS DIGEST
Rubin's Enron Phone Call Was Sign of His Hybrid Role When Robert E. Rubin called the Treasury Department last fall to see if there was anything the Bush administration could do to save Enron, a client of his current employer, Citigroup, he spoke as a banker. But he also spoke as a former Treasury secretary concerned about the risks to the nation's markets. Mr. Rubin's call inadvertently gave comfort to the White House and some conservative commentators, who gleefully tagged it as evidence that it was a prominent Democrat who backed a government rescue -- not Republicans who received the bulk of Enron's generous campaign contributions. [Section A.]