Only 43 percent of people believe President Obama is a strong leader — the lowest rating of his presidency, according to an ABC News-Washington Post poll released Tuesday. 

Another 55 percent polled said he is not a strong leader. 

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The poll also found 52 percent believe Obama's presidency, on balance, has been a failure; 42 percent believe it has been a success. 

His highest marks came on questions of whether he is honest and trustworthy and understands the problems of average citizens. Forty-nine percent say he does. 

The poll comes a day before the president is set to outline his strategy on confronting the Islamic State in Iraq and Syria (ISIS). The poll found a large shift in support for airstrikes against the terrorist group after it released videos showing the beheading of two U.S. journalists. 

Seventy-one percent now support airstrikes in Iraq — up 17 percent in the last month. Another 65 percent support airstrikes in Syria. 

The United States has launched more than 140 strikes against the group in Iraq and a growing chorus would expand the strikes to Syria. 

Ninety-one percent say ISIS is now a serious threat and 59 percent called it a "very serious" threat. 

The poll surveyed 1,001 people and has a margin of error of plus or minus 3.5 percent.