I had seen this poster on Facebook, and since I cannot trust such graphics without seeing the source, I did a little search and found that the stats came from a new poll released yesterday showing that the Republican anti-Hillary Benghazi campaign has not been effective in shaking public trust in Hillary Clinton.
Voters think Congress should be more focused on other major issues right now rather than Benghazi. By a 56/38 margin they say passing a comprehensive immigration reform bill is more important than continuing to focus on Benghazi, and by a 52/43 spread they think passing a bill requiring background checks for all gun sales should be a higher priority.
One interesting thing about the voters who think Benghazi is the biggest political scandal in American history is that 39% of them don't actually know where it is. 10% think it's in Egypt, 9% in Iran, 6% in Cuba, 5% in Syria, 4% in Iraq, and 1% each in North Korea and Liberia with 4% not willing to venture a guess.