The European Commission is also reviewing the deal and has said it will make a decision on whether to block it by March 30. Oracle, based in Redwood Shores, Calif., recently filed a list of five candidates whom it planned to nominate to PeopleSoft's board in the hope of staging a proxy fight for control. On Tuesday, Lawrence J. Ellison, Oracle's chief executive, filed a letter with the Securities and Exchange Commission that the company intended to send to PeopleSoft shareholders in hopes of winning their support.