Gen. John Allen: How top US commander got caught up in Petraeus scandal (+video)
In a White House statement early Tuesday, National Security spokesman Tommy Vietor said President Barack Obama has held Allen's nomination at Panetta's request. Obama, the statement said, "remains focused on fully supporting our extraordinary troops and coalition partners in Afghanistan, who Gen. Allen continues to lead as he has so ably done for over a year."
Meanwhile, FBI agents prepared a timeline of the Petraeus affair and searched the home of Paula Broadwell, the 40-year-old biographer with whom the 60-year-old Petraeus had an affair that led to his abrupt resignation Friday.
The resignation and his acknowledgement of an affair stunned Washington because of the former general's highly disciplined and well-praised career, which had led some to speculate whether a run for the White House would be in his future. The 60-year-old retired Army general headed U.S. military operations in Iraq and Afghanistan before taking charge of the CIA.
It was Broadwell's threatening emails to Jill Kelley, a 37-year-old Florida woman who is a Petraeus family friend, that led to the FBI's discovery of communications between Broadwell and Petraeus indicating they were having an affair.