If you want to copy an existing poll to make changes but do not want to lose the response data in that poll, you can easily make a copy by selecting the checkmark to the left of the poll on your My Polls page and then clicking the Copy button at the top right:
The system will prompt you to enter a title for the new poll and then click Submit. The new poll will be available on your My Polls page and you can use the icons to edit or launch the poll.
For more information on SurveyMethods Polls, visit the SurveyMethods Polls help article.