A lawyer for Donald Trump Donald John TrumpUS reimposes UN sanctions on Iran amid increasing tensions Jeff Flake: Republicans 'should hold the same position' on SCOTUS vacancy as 2016 Trump supporters chant 'Fill that seat' at North Carolina rally MORE launched an attack at Hillary Clinton Hillary Diane Rodham ClintonJeff Flake: Republicans 'should hold the same position' on SCOTUS vacancy as 2016 Momentum growing among Republicans for Supreme Court vote before Election Day Warning signs flash for Lindsey Graham in South Carolina MORE on Tuesday, sharing an image on Twitter accusing her of having "murdered an ambassador."

Michael Cohen, Trump's special counsel and executive vice president of the Trump Organization, has said he doesn't speak on behalf of the presumptive GOP presidential nominee's campaign.

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In the tweet, Cohen refers to an NBC/Wall Street Journal poll of Trump beating Clinton on honesty and national security, adding, "This picture says it all!"

The poll finds Clinton leading Trump nationally by 5 points, though it shows Trump holding a double-digit lead on being "honest/straightforward" and leading on terrorism and national security.

Republicans have long argued that then-Secretary of State Clinton is culpable for the Sept. 11, 2012, attacks in Benghazi, Libya, that left Ambassador Chris Stevens and three other Americans dead.

The GOP-led House committee investigating the attacks for two years released its report Tuesday morning , offering new details about the Obama administration's response.

Democrats dismissed the report as not fundamentally changing the story surrounding the attacks. Clinton's presidential campaign accused Republicans of peddling "discredited conspiracy theories."

"I knew and admired Chris Stevens," Clinton noted during her marathon hearing before the committee in October.