The White House on Wednesday said a new audio tape from Osama bin Laden calling for jihad demonstrated the al Qaeda leader's isolation and was likely an effort to raise money.

"It appears this tape demonstrates his isolation and continued attempts to remain relevant at a time when al Qaeda's ideology, mission, and agenda are being questioned and challenged throughout the world," White House spokesman Gordon Johndroe said.

"This also looks to be an effort to raise money as part of their ongoing propaganda campaign," he said.