David Petraeus will testify before Senate Mr Petraeus, who only took command of the CIA 14 months ago, after a storied career in the military in which he commanded troops in Iraq and Afghanistan, had been due to testify to Congress this week on the September 11 assault in Benghazi, Libya, that killed four Americans, including US ambassador Chris Stevens and two former Navy SEALs working for the CIA. But with his sudden resignation, his replacement, acting CIA director Michael Morell, was expected to replace him in a number of the hearings on the attack. Dianne Feinstein, the Senate Intelligence Committee Chairman, told Politico that he would testify. Mr Petraeus has indicated his willingness [to testify]. He is eager to come before the committee so we will work out the details," she said. The exact schedule has not been set for his testimony however. Earlier, Fox News had reported the former CIA director will testify voluntary on Friday before both congressional intelligence committees. He was initially slated to appear beore the Senate Intelligence Committee on Thursday. Mr Petraeus has not been seen since Friday, when the news of his affair with Mrs Broadwell broke. As the Petraeus scandal continues to dominate headlines, Barack Obama is to give his first post-election press conference later on Wednesday. He is widely expected to address the situation, which has now enveloped General John Allen, the top US commander in Afghanistan. ISAF Commander General John Allen is under investigation after allegedly sending inappropriate emails to Jill Kelley, the woman linked with the scandal which resulted in the resignation of CIA head General David Petraeus The White House has expressed confidence in Gen Allen after the four-star general was linked to the scandal. Gen Allen was placed under investigation after FBI agents probing email threats sent by Petraeus" mistress stumbled upon a vast trove of messages Allen sent to another married woman at the heart of the scandal. According to a senior Pentagon official, the married general denies any sexual liaison with 37-year-old Tampa socialite Jill Kelley, but the "sheer volume" of correspondence could amount to "conduct unbecoming an officer." Due to face a hearing this week to confirm his promotion to the post of Nato's supreme commander in Europe, Allen will now return to Kabul and remain in charge of allied forces in Afghanistan until the probe is over.