Ben Carson insists he'll press on in his longshot White House bid despite heading toward a disappointing Super Tuesday.

"We still have millions of Americans who are saying on Facebook, ‘You cannot leave us, we have to have a representative of honesty, integrity, and somebody who is not a politician,'" Carson said during a speech in Baltimore.

“I’m not ready to quit."

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Carson seems unlikely to finish in the top three in any state voting on Super Tuesday, narrowing his path to the nomination even further.

Robert Dees, Carson's campaign chairman, admitted to The Washington Times on Tuesday that even he doesn't know how the former neurosurgeon can win the nomination. 

Yet, Carson told supporters Tuesday he will soldier on.

"We've got to be able to be strong, we cannot give up," he said. "It's often darkest before the dawn."

Carson lamented that America continues to fight a "war on virtually everything imaginable to keep us divided," citing divisions over race, income, gender and religion.

He added that America must stand united because of the threat of "radical Islamic extremists."