Story highlights Hillary Clinton is viewed unfavorably by 57% of Americans

It's her lowest mark in her 24 years in national politics

Philadelphia (CNN) Hillary Clinton's image is now at its lowest point in her 24-year career on the national political scene, a new poll shows.

Clinton's is viewed unfavorably by 57% of Americans, compared to 38% who view her favorably, according to Gallup's daily tracking poll

While those are problematic marks for her campaign, they mean Clinton is only slightly more popular than her Republican opponent Donald Trump -- whose favorability rating is at 36% compared to 59% who see him unfavorably.

It's a sharp drop for Clinton, whose numbers been turned on their head from when she left public office in 2013 after a four-year stint as President Barack Obama's secretary of state.

A CNN/ORC poll found Donald Trump had surged past her into the lead in the presidential race last week, with a strong bump out of the Republican National Convention. That suggests Clinton could benefit from this week's Democratic National Convention, as well.

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