Presidents typically get a rally-round-the-flag reaction from the American public during a crisis, says Barbara Perry, a presidential scholar at the University of Virginia's Miller Center. President Jimmy Carter, though he would become very unpopular, got a surge of public support after Iran took hostages at the U.S. embassy in Tehran in late 1979. President George W. Bush, who had middling support after winning his 2000 election, saw his approval rating soar in the wake of the 9/11 attacks, as Americans united around their leader.
Barbara Perry