Story highlights "I won't vote for Hillary. I can't vote for her," Yahne Ndgo said

This Pennsylvania voter said she'd vote for the Green Party if there's no Sanders

Washington (CNN) For at least one Bernie Sanders supporter, it's "Bernie or bust."

Speaking Tuesday as part of a panel of voters on CNN's "New Day," Pennsylvanian Yahne Ndgo underscored what could be a general election problem for Hillary Clinton if she wins the Democratic presidential nomination.

"I'm definitely Bernie or bust," Ndgo said. "I won't vote for Hillary. I can't vote for her."

Ndgo said one of the reasons she can't support Clinton is because of her "harmful" impact on foreign countries as secretary of state.

"The footprint that we've had in other countries is not really all that diplomatic," she said. "I think that we've been harmful in a lot of other countries and that Hillary Clinton has been a force for that harm in other countries."

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