WASHINGTON (AP) — William Barr once advised that a president didn't need Congress' permission to attack Iraq, that his administration could arrest a foreign dictator and that the FBI could capture suspects abroad without that country's consent.

It's an expansive view of presidential power and an unsettling one for Democrats as the Senate holds a confirmation hearing next week for Barr, a onetime attorney general and President Donald Trump's pick to again serve as America's top law enforcement official.

Democrats already fear that Barr, if confirmed, would be overly deferential to Trump in a po...