Former Vice President Mike Pence was heckled Friday with calls of “traitor” as he delivered remarks at a conservative policy conference in Kissimmee, Florida.

At first, Pence was greeted by cheers when he appeared on stage at the Faith and Freedom Coalition event, which was billed as charting a policy course toward a conservative majority. But as he began speaking, he was briefly interrupted by a woman who shouted “traitor” several times before she was escorted out. Pence ignored the outburst and continued with his speech.

It’s unclear who the woman was or what her motivation was for heckling Pence. As she started, others in the audience also appeared to yell "no!" repeatedly as Pence spoke over the cacophony.