2019 general election nans issue warning to presidential candidates

I apologize, but I couldn't find any information on "Nans" issuing a warning to presidential candidates in the 2019 general election. It's possible that you may have come across a misleading or satirical article.

However, I can suggest some possible alternatives:

• You may be referring to a different election or event. Could you please provide more context or clarify which election or event you are referring to?
• If you are referring to the 2019 Nigerian general election, I couldn't find any information on "Nans" (which I assume stands for National Association of Nigerian Students) issuing a warning to presidential candidates. It's possible that you may have come across a misleading or satirical article.
• If you are referring to a different country or election, please provide more context or clarify which election or event you are referring to.

I'm here to help and provide accurate information to the best of my abilities. Please feel free to provide more context or clarify your question, and I'll do my best to assist you.