Even worse for the Dems, a majority of Americans disapprove of how Hillary Clinton handled the attack.

Washington (CNN) – Around half the public says they support another congressional investigation into the Benghazi attack, according to a new national poll.

The reason?

The ABC News/Washington Post survey indicates that nearly six in ten say the Obama administration has tried to cover up the facts on the September 11, 2012 attack, which left U.S. ambassador to Libya Chris Stevens and three other Americans dead.

As for Hillary Clinton, half of those questioned in the poll, which was released Tuesday, say they disapprove of how then-secretary of state handled the attack.

Steven’s death was the first time a U.S. ambassador had been killed on duty in more than 30 years. The Benghazi attack has become a partisan flashpoint around the Obama administration’s conduct of foreign policy. Republicans have sharply criticized the administration’s handling of the matter from security preparations beforehand, to its response during the attack, and its slow-to-evolve public explanation after-the-fact.