Bernie Sanders supporters may be “feeling the Bern” for their own candidate, but nearly half are planning to give Democratic front-runner Hillary Clinton the cold shoulder in November.

YouGov poll released on Wednesday showed that 45 percent of Democrats who preferred Sanders in the primary, do not plan on voting for Clinton in the general.

Supporters of the Vermont senator are extremely divided; 18 percent said they plan on voting for a third-party candidate like Jill Stein of the Green Party, 15 percent would support the presumptive Republican nominee Donald Trump, 9 percent were unsure, and 3 percent do not plan on voting at all.

The split on the left comes after months of rising tension between Sanders, the Democratic establishment, and Clinton.