President Obama and his national security advisers are considering expanding the American covert war in Pakistan far beyond the unruly tribal areas to strike at a different center of Taliban power in Baluchistan, where top Taliban leaders are orchestrating attacks into southern Afghanistan.

According to senior administration officials, two of the high-level reports on Pakistan and Afghanistan that have been forwarded to the White House in recent weeks have called for broadening the target area to include a major insurgent sanctuary in and around the city of Quetta.