The Washington Post is reporting exclusively that documents found at Osama bin Laden’s compound in Pakistan show that he directed operatives to kill President Obama and Gen. David Petraeus.
Post columnist David Ignatius filed the report and wrote this:

“’The reason for concentrating on them,’ the al-Qaeda leader wrote, in a document recovered by U.S. forces during the May 2 raid on the compound, ‘is that Obama is the head of infidelity and killing him automatically will make (Vice President Joe) Biden take over the presidency. … Biden is totally unprepared for that post, which will lead the U.S. into a crisis. As for Petraeus, he is the man of the hour … and killing him would alter the war’s path’ in Afghanistan.”

Ignatius reports that he was given an exclusive look at the documents by a senior administration official.

Administration officials said they never considered the Obama-Petraeus plot a serious threat. But it appears that the administration considered the plot disturbing enough to take pre-emptive action.

“The man bin Laden hoped would carry out the attacks on Obama and Petraeus was the Pakistani terrorist Ilyas Kashmiri,” Ignatius wrote. “’Please ask brother Ilyas to send me the steps he has taken into that work,’ bin Laden wrote to his top lieutenant, Atiyah Abd al-Rahman. A month after bin Laden’s death, Kashmiri was killed in a U.S. drone attack.”
You can read more here.