In his new book Obama's Wars, Bob Woodward says the president and his aides are deeply divided over the war in Afghanistan, and that the exit strategy to get troops out the region was rooted in politics.
Woodward -- who helped uncover the Watergate scandal -- claimed President Barack Obama pressed advisors for a withdrawal date, then set a timetable himself because he couldn't "lose the whole Democratic Party."
Obama's top White House adviser on Afghanistan and his special envoy for the region are described in the book as believing the surge and withdrawal strategy will not work.
White House Press Secretary Robert Gibbs said it shouldn't be a surprise there was a vigorous debate when developing the Afghan war strategy.
"I can't imagine that any option that the president looked at would not have engendered some debate," he said.
Woodward also said in the book that U.S. intelligence found Afghan President Hamid Karzai suffers from manic-depression and is on medication for it. Waheed Oman, a spokesman for President Karzai said those claims are false.
"This is a baseless, inflammatory comment that has its roots in a defaming propaganda campaign against President Karzai's personal integrity, leadership and his stances on matters of Afghan national interests," he said.
Obama Wars is scheduled to release next week.